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 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 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

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