The Aquarist’s Edge [Weekly Aquarium Podcast]

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 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 cichlid breeding line, this episode gives you the practical answers.

Topics include: livebearer hybrids, platy and swordtail crossing, mbuna hybridisation, flowerhorn and blood parrot cichlid origins, Corydoras hybrids, fish genetics and hybrid viability, hybrid sterility in cichlids, ethics of fish hybridisation, conservation risks, preventing accidental hybrids.

Enjoyed the episode? Please follow The Aquarist's Edge and leave a review to help more freshwater aquarists discover the show.

⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show.

☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom

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 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 Clouds, or any unheated community tank and have been told plants just aren't for you, this episode will change how you plan your next aquascape.

Enjoyed the episode? Please follow The Aquarist's Edge and leave a review to help more freshwater aquarists discover the show.

⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show.

☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom

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 care can raise.

If you're chasing more vibrant fish, wondering why your tank doesn't look as colourful as you'd hoped, or just curious what's actually happening beneath the surface, this episode will help you separate what you can influence from what you can't.

Topics include: fish colour, colour-enhancing fish food, carotenoids in fish diet, fish stress and colouration, aquarium lighting for colour, substrate and fish colour, shoaling fish behaviour, fish genetics, freshwater fish care, and realistic fishkeeping expectations.

Enjoyed the episode? Please follow The Aquarist's Edge and leave a review to help more freshwater aquarists discover the show.

⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show.

☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom

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 considering your first freshwater aquarium, working with a limited budget or space, or looking for ways to make fishkeeping easier to maintain, this episode will help you build an aquarium that fits your life while still meeting the needs of your fish.

Topics include: beginner fishkeeping, affordable aquarium setups, aquarium maintenance, fish welfare, aquarium costs, small aquariums, accessible fishkeeping, nitrogen cycle basics, freshwater aquarium care, and responsible fishkeeping.

Enjoyed the episode? Please follow The Aquarist’s Edge and leave a review to help more freshwater aquarists discover the show.

⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show. 

☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom

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 corys, Sterbai corys or another member of the Corydoradinae group, this practical freshwater aquarium care guide will help you create better conditions for healthy, active and confident fish.

If you enjoy freshwater aquarium care, tropical fishkeeping, Corydoras care guides and practical aquarium advice, subscribe to The Aquarist’s Edge and leave a review to help more aquarists discover the show.

⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show. 

☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom

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.

 

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☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom

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.

🔗 Podcast episode referenced: Stop Feeding Your Fish Everyday - https://theaquaristsedge.beam.ly/episode/why-fasting-your-fish-improves-health-water-quality-and-tank-balance

⭐ Enjoying the podcast? Please leave a review as it helps other fishkeepers find the show. 

☕ Support the show by buying Art a coffee: https://ko-fi.com/artsfishroom