The Aquarist's Edge

Can you actually cross-breed aquarium fish, and would you even want to? This episode looks at where hybridisation really happens in the freshwater hobby, and what it means for the fish and the fishkeeper when it does. Art works through the two groups where crossing is most common — livebearers like platies and swordtails, which will hybridise without any encouragement at all, and cichlids, where mbuna cross in mixed tanks and fish like flowerhorns and blood parrot cichlids exist purely because of deliberate breeding. He also covers the less-talked-about case of Corydoras catfish hybridising in mixed shoals, the genetics behind why so...

What a rookie error! This is a short apology to all those who happened to listen to the very raw unedited version of Series 3 Episode 31 earlier today...

Can you actually cross-breed aquarium fish, and would you even want to? This episode looks at where hybridisation really happens in the freshwater hobby, and what it means for the fish and the fishkeeper when it does. Art works through the two groups where crossing is most common. He also covers the less-talked-about case of Corydoras catfish hybridising in mixed shoals, the genetics behind why some crosses produce healthy fry and others don't, and why hybrid cichlids are so often sterile. If you've ever wondered whether your "tuxedo platy" is really a hybrid, or you're trying to keep a clean...

Can you actually grow plants in a tank with no heater? In this episode of The Aquarist's Edge, Art breaks down why coldwater and goldfish tanks developed such a bad reputation for plants and which ones genuinely thrive in them. He works through the tough, unappetising options that survive both cold water and grazing fish, the "sacrificial" plants worth growing on purpose so goldfish have something to eat that isn't your centrepiece, and the lighting, substrate, and CO2 basics that actually determine whether any of it grows. Along the way there are practical, do-it-this-week tips. If you keep goldfish, White...

Can better colour really be trained into a fish, or is it mostly down to luck and genetics? In this episode of The Aquarist's Edge, Art breaks down what actually drives fish colouration, from diet and water quality to lighting, substrate, and social grouping. He looks at where colour genuinely comes from, why carotenoid-rich foods matter for reds and oranges, how chronic stress quietly dulls even healthy fish, and why factors like substrate tone and shoal size can visibly change how a fish displays. The episode also sets realistic expectations, since genetics ultimately sets the ceiling no amount of good...

Is fishkeeping really an accessible hobby, or is it more demanding than it first appears? In this episode of The Aquarist’s Edge, Art looks at the true cost of freshwater fishkeeping, the space and time an aquarium requires, the physical demands of maintenance, and the knowledge beginners need before getting started. He also explores how aquarium care can be made easier and more inclusive without compromising fish welfare. From choosing manageable aquarium sizes and simplifying maintenance to avoiding information overload and understanding the nitrogen cycle, this episode offers practical advice for beginners and experienced aquarists alike. If you are co...

Corydoras are some of the most popular freshwater catfish in the aquarium hobby, but keeping them successfully involves far more than simply adding a few "bottom cleaners" to your tank. Art covers the essentials of Corydoras care, including ideal group size, aquarium setup, substrate choice, feeding, water conditions, tankmates, common health concerns and some of the unusual behaviours that often confuse new keepers. You’ll also learn why Corydoras should not be expected to survive on leftovers, why species-specific temperature requirements matter, and what those sudden trips to the surface actually mean. Whether you keep panda corys, bronze corys, peppered co...

Choosing a new fish is one of the most exciting parts of freshwater fishkeeping but it is also where many long-term aquarium problems begin. In this episode Art explores the single most important question to ask before buying a fish, along with six practical checks covering adult size, aquarium suitability, compatibility, feeding, quarantine and long-term care. Whether you are stocking your first community aquarium or adding a new species to an established tank, this episode will help you make more responsible fish choices and avoid common mistakes such as overcrowding, aggression, poor diet and unsuitable water conditions.   ⭐ Enjoying the podcast? Ple...

A healthier aquarium does not always require expensive equipment or complicated treatments. In this episode Art explores five simple adjustments that can improve water quality, reduce algae, support healthier fish and make aquarium maintenance easier. Learn how to improve feeding, lighting, water circulation, water changes and daily observation without disrupting the stability of your freshwater aquarium. These practical fishkeeping tips are ideal for beginner and intermediate aquarists who want cleaner water, healthier fish and a more reliable aquarium routine. ⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show.  ☕ Support the show by buying Art a cof...

What happens when you love aquarium keeping, but your landlord says no tanks? In this episode of The Aquarist’s Edge, we explore how to negotiate aquarium restrictions responsibly, gain practical fishkeeping experience without owning a tank, and use virtual aquariums to develop useful planning and aquascaping skills. You’ll also discover how learning about the nitrogen cycle, fish compatibility, local water parameters, and aquarium equipment now can give you a major advantage when you eventually set up your first freshwater aquarium. Have you ever been prevented from keeping an aquarium by a lease, budget, move, or change in circumstances? Shar...

In today's episode of The Aquarist's Edge, Art explores the five most common fish diseases every freshwater aquarist eventually faces: white spot (ich), fin rot, fungal infections, velvet, and dropsy. He explains exactly how to identify and treat each one. Whether you're struggling with a tank suddenly covered in white spots or worried about ragged fins, this episode is packed with clear treatment plans you can use straight away. Learn what's really happening to your fish, from the protective slime coat and the role of stress, to the parasite life cycles that make treatment timing so important. You'll also learn...

Has the aquarium that once helped you relax started to feel like another source of stress? In this episode of The Aquarist’s Edge, Art explores aquarium burnout, fishkeeping guilt and the cycle that can turn an enjoyable hobby into an overwhelming maintenance burden. You’ll learn why aquarium motivation fades, how perfectionism and decision fatigue affect fish keepers, and how to create a realistic recovery plan without immediately dismantling your tank. Healso discusses simplifying multiple aquariums, establishing a minimum care routine, reconnecting with the creative side of fishkeeping and recognising when responsible rehoming may be the right decision. Whether you...

A healthy aquarium does not need to look like a flawless social media post. In this episode of The Aquarist’s Edge, Art examines how aquarium perfectionism develops, why online aquascapes can create unrealistic expectations, and how constant adjustments may affect both your enjoyment and your fish. You’ll learn how to separate responsible aquarium care from anxiety-driven maintenance, evaluate your tank using fish welfare and stability rather than appearance alone, and set realistic standards for planted aquariums and freshwater fishkeeping. Discover why algae, uneven plant growth, visible equipment and changing layouts are not always signs of failure, and why a su...

Can you move indoor aquarium fish outdoors for the warmer months? In this episode of The Aquarist’s Edge, Art explores how to keep freshwater aquarium fish outside safely. We cover seasonal timing, outdoor tub and pond setup, temperature swings, predators, oxygen levels, algae, feeding, breeding, and the importance of preventing aquarium fish from escaping into local waterways. Whether you’re considering guppies, ricefish, white cloud mountain minnows, goldfish, or other hardy freshwater species, this episode will help you make better decisions for fish health and environmental safety. You’ll learn why outdoor fishkeeping can bring out natural behaviours and breedi...

Ever bought “schooling fish” and watched them split up into little cliques? In this episode of The Aquarist’s Edge, Art breaks down the real difference between shoaling vs schooling, why many popular “schooling fish” don’t actually school in home tanks, and how to set up your aquarium to bring out natural group behaviour. You’ll learn which freshwater species are the best schooling and shoaling fish for community aquariums, plus the practical rules that make a school look tight, confident, and stress-free. If you want a calmer tank, better fish confidence, and that “moving as one” look, this episode is your bl...

In this episode Art explores unusual everyday foods that can be safely used as occasional treats in a freshwater aquarium. From courgette, cucumber, peas, spinach, pumpkin, butternut, sweet potato, carrot, and green beans, you’ll learn which foods suit different freshwater fish and how to prepare them properly. We also explain why these foods should supplement, not replace, a balanced fish food diet, and how to avoid common feeding mistakes that can affect water quality. Whether you keep goldfish, guppies, mollies, bristlenose plecos, corydoras, bettas, shrimp, or snails, this episode will help you make safer, more informed feeding choices. You’ll a...

Guppies are more than “beginner fish"! They’re colourful, interactive, and endlessly entertaining in a home freshwater aquarium. In this episode of The Aquarist’s Edge, Art shares why guppies are so fun to keep, from their bold personalities and constantly-on-the-move behaviour to the way lighting and tank design make their colours explode. He also covers the reality of guppy breeding and fry, smart stocking and tank setup tips, and simple troubleshooting for common guppy problems like fin damage and stress.   _____________________________________________ guppy fish, guppies, guppy care, guppy tank setup, livebearer fish, freshwater aquarium fish, guppy breeding, planted tank guppies, beginner fishkee

In this episode of The Aquarist’s Edge, Art explores why minerals are essential for a healthy freshwater aquarium. From GH and KH to pH stability, fish health, shrimp moulting, snail shell development, and aquarium plant growth, you’ll learn how dissolved minerals quietly shape the success of your tank. Whether you use tap water, RO water, or a planted aquarium setup, this episode will help you understand what your water is really doing. We also explain why clear water is not always healthy water, why chasing pH can cause problems, and how to create stable, suitable water for your fish...

Activated carbon (often called “charcoal”) is one of the most common aquarium filter media, but what does it actually do, and do you really need it running all the time? In this episode of The Aquarist’s Edge, Art breaks down how activated carbon works, what it removes, what it doesn’t remove, and the best times to use it in a freshwater aquarium. You’ll also learn why pet shops sell carbon so aggressively and how to avoid the cartridge-replacement trap that can destabilise your filter.

Want a freshwater aquarium that stays stable, looks great, and doesn’t turn into a weekly stress project? In this episode of The Aquarist’s Edge, Art breaks down exactly how to build a low-stress aquarium setup. An aquarium that’s forgiving, low-maintenance, and reliable even when life gets busy. You’ll learn how to pick the right tank size for stability, simplify filtration, choose hardy fish and easy plants, set a sensible lighting schedule, and create a routine you’ll actually stick to.

Keeping a freshwater aquarium at home can be one of the most calming, rewarding hobbies; until a heater fails, algae takes over, or the guilt of fish loss hits hard. In this thoughtful episode of The Aquarist’s Edge, Art reflects on the real positives and negatives of home aquariums: stress relief, routine, learning, ethics, hidden costs, and how to keep the hobby enjoyable without chasing perfection. You’ll walk away with practical ways to simplify your setup, reduce anxiety, and build a tank that fits your real life.

Art breaks down aquarium lighting in a way that makes real sense for everyday freshwater fishkeepers. He covers the science behind PAR, spectrum, lumens, Kelvin, and photoperiod, and explain how these affect plant growth, fish behaviour, and algae control in a home aquarium. Whether you are setting up a low-tech planted tank or trying to understand why your aquarium light is causing problems instead of solving them, this episode gives you practical, easy-to-apply guidance. You’ll learn how aquarium lights actually work, why more light is not always better, how to avoid common lighting mistakes, and what to look for wh...

Your aquarium filter is a living habitat where biofilm, oxygen, and water flow decide how stable (or fragile) your freshwater tank becomes. In this episode of The Aquarist’s Edge, Art breaks down what actually happens inside sponge filters, canister filters, and hang-on-back filters, and why upgrading a filter can sometimes make a tank worse if the habitat shifts. You’ll learn how filter flow rate, surface agitation, and filter media choices shape your biological filtration, water clarity, and long-term consistency. 💬 Join the conversation: Have you ever upgraded a filter and your tank got worse? Tell us what changed. SEO keyword...

In this episode of The Aquarist’s Edge, Art breaks down 10 proven ways to make your freshwater aquarium healthier. This episode will help you stabilise your tank and prevent problems before they start. Expect practical fishkeeping advice, clear science, and realistic routines you can follow even when life gets busy. You’ll learn how to improve freshwater fish health, protect your biological filtration, manage ammonia, nitrite and nitrate, and create a healthier aquarium environment with less stress and more consistency. **LISTENER NOTE** - This is the first episode with no music in the background. Let me know if you prefer it t...

In this episode of The Aquarist’s Edge, Art shares 10 proven ways to make your freshwater aquarium healthier. If you’re dealing with cloudy water, algae flare-ups, stressed fish, or “mystery” health issues, this episode will help you stabilise your tank and prevent problems before they start - practical fishkeeping advice, clear science, and realistic routines you can follow even when life gets busy. You’ll learn how to improve freshwater fish health, protect your biological filtration, manage ammonia, nitrite and nitrate, and create a healthier aquarium environment with less stress and more consistency. 🎵 Music: "Hall Light - Instrumental" - Victor Lundberg...

Many aquarists don’t leave the hobby at the beginning of their aquarium journey. They leave during the stage when their aquarium suddenly becomes difficult to manage. Algae outbreaks, plant melt, unstable water conditions, and constant adjustments can make even a promising tank feel frustrating and discouraging. In this episode Art explores the phase where many aquarists consider giving up. He shares why this stage happens, what is actually going on inside the aquarium ecosystem, and how hobbyists can move through this difficult period toward a more stable and rewarding aquarium. Topics covered include: The difference between cycled tanks and ma...

Shy fish can turn a beautiful freshwater aquarium into an “invisible fish” tank but most hiding behaviour has clear, fixable causes. In this episode of The Aquarist’s Edge, Art breaks down why fish stay tucked away and how to coax them into the open without stress using smarter aquascaping, gentler lighting, confidence-building feeding routines, and a quick social “bully check.” Whether you keep tetras, rasboras, corydoras, or other community fish, this episode will leave you with a practical plan to help your fish feel safe and behave naturally.   🎵 Music: "Feels Like That (Instrumental)" - Victor Lundberg (Epidemic Sound - https://www.ep...

Do you want a freshwater aquarium that stands out without keeping difficult fish? In this episode of The Aquarist’s Edge, Art explores unusual but easy-to-care-for freshwater aquarium fish that thrive in normal home setups. You’ll learn the aquarist “keeper moves” that make oddball fish feel effortless: tank setup tips, feeding strategies, compatibility advice, and the simple tweaks that stop shy fish from disappearing. If you’re building a planted community tank, a nano setup, or a river-rock oddball aquarium, this episode will help you choose fish that are both unique and beginner-friendly, while still rewarding you with incredible behaviour...

Art explores a question many hobbyists quietly relate to: why do so many home aquarists seem to be neurodivergent, including people with ADHD traits, autistic traits, anxiety traits, and strong systems-thinking? Is this reality or simply perception? The episode looks at the science-meets-hobby reasons aquariums can feel uniquely regulating: predictable routines, measurable cause-and-effect, soothing sensory input, and the deep satisfaction of observation and pattern recognition. You’ll also hear practical, beginner-friendly ways to build an aquarium routine that works with your brain, not against it; covering overwhelm, perfectionism, impulsive upgrades, and how to simplify maintenance so your tank stays stable ev...

Tiger barbs are hardy, colourful, and endlessly entertaining but they’re also one of the most commonly mis-stocked freshwater fish, which is why fin-nipping and “random aggression” show up so often. In this episode of The Aquarist’s Edge, Art breaks down a complete tiger barb care guide: the best tank size in litres, the ideal schooling group size, the most effective ways to reduce aggression, and how to choose tank mates that won’t get harassed. You’ll also learn practical feeding strategies for health and colour, how to set up your aquascape with sight breaks and swimming lanes, and ways to...

In this episode of The Aquarist’s Edge, Art explores why the freshwater aquarium hobby needs you. It's not just the experts, not just the big creators, but everyday aquarists who choose patience, good husbandry, and kindness with beginners. You’ll learn how your decisions around aquarium cycling, stocking, quarantine, water testing, and maintenance routines ripple outward to shape fish welfare, local fishkeeping culture, and even what aquarium shops stock. We also unpack how to help new hobbyists without gatekeeping, how to spot and avoid harmful trends, and how to “vote with your wallet” to support ethical fishkeeping. Whether you keep a si...

Algae in freshwater aquariums isn't always a nuisance. It’s a clear signal about lighting, nutrients, plant health, organics, and overall tank stability. In this episode of The Aquarist’s Edge, Art flips the script on aquarium algae and shows you how to “read” what your tank is telling you, identify common algae types (green hair algae, black beard algae, diatoms, green film algae, and cyanobacteria), and reduce algae naturally without wrecking your aquarium balance. You’ll walk away with practical steps to control algae long-term, support healthy plant growth, and keep your aquarium looking great with realistic maintenance. 🎵 Music: "Breathe In Br...

Art breaks down the real differences between Endler’s livebearers and guppies, going far beyond size and colour. You’ll learn how species genetics, natural behaviour, and evolutionary history shape their health, activity levels, and breeding patterns in the aquarium. You'll hear about the science behind Endlers’ constant foraging behaviour, why guppies and Endlers hybridise so easily, and how tank design, mineral content, temperature, and feeding strategies directly affect long-term success. Whether you’re keeping Endlers, guppies, or both, this episode provides practical, experience-based advice to help you build stable, thriving livebearer tanks.   ⭐ Enjoying the show? Leave a review and help other...

This episode exposes one of the most dangerous myths in guppy keeping: that you need perfect water parameters to keep guppies alive. Discover why constant tweaking of pH, hardness, and temperature quietly kills guppies, and learn what these colourful livebearers actually need: stable, mineral-rich water and a calm, consistent routine. Art  breaks down practical guppy care, soft-water strategies, and more. Whether you’re losing guppies in a new setup or your fancy strains just don’t last, this exploration of guppy water parameters, hard water livebearers, and stable aquarium maintenance will help you turn things around.

This episode explores what your freshwater aquarium is really doing while you sleep. From plant respiration and fish “sleep” behaviour to oxygen levels and filter bacteria, learn more about the hidden night shift inside your tank. Learn how to create gentle lighting transitions, set up smart night-time aeration, and design an aquascape that keeps your fish calm after dark. Two troubleshooting segments tackle common night-time problems: fish panicking when lights turn on or off, and oxygen dips that leave fish gasping at the surface. This episode is perfect for beginner and intermediate freshwater keepers who want to understand their tanks as 2...

Art breaks down the top five New Year resolutions that truly make a difference for freshwater aquarists - not onlyt for your fish, but for your long-term success and enjoyment of the hobby. From building stable aquarium ecosystems to simplifying maintenance routines and improving feeding habits, this episode focuses on practical changes that lead to healthier fish and less stress. Whether you’re a beginner or an experienced fishkeeper feeling overwhelmed, these aquarium resolutions will help you create more balance, consistency, and confidence in your tanks throughout the year. 👉 Leave a review and share your experience with these resolutions 🎵 Music: "Swaying"...

In this episode of The Aquarist’s Edge, Art unpacks the subtle ways your freshwater aquarium can mislead you. Crystal-clear water, active fish, lush plants, and “good” test results can all hide underlying stress, unstable chemistry, and long-term problems. Learn how to read the real signals in your tank: from fish behaviour and flow patterns to plant growth, algae types, temperature stability, and social dynamics. You’ll learn how to think beyond appearances, understand the biology and chemistry happening behind the glass, and build simple habits that stop your tank from “lying” to you for long. Whether you’re cycling your first com...

In this episode of The Aquarist’s Edge, Art unpacks the mindset behind the title “Don’t Assume You Know” and expose the hidden mistakes that quietly ruin freshwater aquariums. From so-called “beginner fish” and misunderstood nitrogen cycles to tap water assumptions, equipment myths, and misread fish behaviour,  learn more about the science and how to stop guessing and start understanding your tank. You’ll learn how to read your fish and plants, how to interpret your water test results properly, and how to build habits that keep your aquarium stable, healthy, and thriving long-term. Whether you’re a new aquarist or you’v...

This episode takes a deep but practical look at overfiltering in freshwater aquariums and explains why more filtration isn’t always better for fish health or long-term stability. Many hobbyists unknowingly create stressed, fragile systems by using excessive flow, oversized filters, or overly aggressive mechanical filtration. You’ll learn how filtration affects fish behaviour, beneficial bacteria, and planted tanks, along with clear signs your aquarium may be overfiltered and how to fix it without sacrificing water quality. If your tank looks clean but never feels stable, this episode will help you rethink filtration from the fish’s point of view. 👉 Leave a r...

In this Christmas holiday special of The Aquarist’s Edge, Art shares calm, practical Christmas and holiday aquarium rituals to keep your freshwater fish tanks thriving while life gets busy. From intentional end-of-year water changes and equipment check-ups to quiet observation sessions, you’ll learn how to turn maintenance into meaningful, repeatable habits. The episode also walks through a simple holiday game plan for feeding, travel, and maintenance.  Whether you keep planted community tanks, nano species, or larger freshwater setups, this episode will help you reset, reflect, and plan realistic aquarium goals for the year ahead without overwhelm. If you enjoy...