The Aquarist's Edge

Has your guppy looked ready to give birth for weeks, with still no fry in sight? In this episode Art explains why a pregnant guppy might not be giving birth. He covers gestation, stored sperm, the late-pregnancy signs to watch for, and how to tell a gravid female from one that’s bloated or ill. It’s for any fish keeper staring at a round guppy and wondering what to do next. 💬 Join the conversatio...

What would your fish say if they could send you a voice note? In this episode, a goldfish in a bowl, a betta in a vase, a nipped angelfish, a lonely neon and a few others write in to an aquarium agony aunt with the problems they face most often. It's a light-hearted look at the most common beginner aquarium mistakes, with honest, practical answers for new and experienced fish keepers alike. 💬 Joi...

Did you choose the stuff on the bottom of your tank by colour? Most of us did, but your substrate affects your water chemistry, your plants, and whether fish like corydoras and eartheaters can feed the way they're built to. This episode compares gravel, sand, aqua soil, crushed coral, dirted tanks and bare-bottom tanks, matches each to the fish and shrimp that suit it, and works through some of th...

Why did your first fish die within days of setting up the tank? It's called new tank syndrome, and it's just one of ten hard lessons this episode covers. Whether you're setting up your very first aquarium or you've been in the hobby for years, this one's built to catch something you didn't know you needed to hear. 💬 Join the conversation: What's the mistake you made early on in this hobby that yo...

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 m...

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 so...

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...

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...

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...

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...

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...

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 a...

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, l...

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...

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 realisti...

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 you...

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 cons...

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 fi...

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 di...

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, sma...

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 un...

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 agg...

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...

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 perfect...