Karl the Fish Guy

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Karl the Fish Guy

Fishkeeper and aquarist for over 30 years. "Water too pure, breeds no fish"
- Hong Zicheng 菜根譚 c.1596 Will you join me?

Lifelong fishkeeper and aquarist, returning from a multi-year break from the fish hobby and pet trade. I now write about my fishkeeping experiences, while rekindling my love for the hobby/trade that I have spent the majority of my adult life doing. To sum it up, welcome to the chronicle of my fishkeeping adventures, past and present.

29/10/2026

An ambitious effort to eradicate invasive spotted bass from South Africa’s Breekkrans River has unfolded about two hours north of Cape Town. Removing the bass has helped give the critically endangered doring fiery redfin (Pseudobarbus doring) a fighting chance against extinction. “Spotted bass w...

28/10/2026

CSIRO scientists have identified an underwater mountain off Tasmania where a threatened deep-sea eel species gathers annually.

12/10/2026

Interesting!

Nitrate reduction with organic carbon dosing - By Tony Griffitts

11/10/2026

Costa Rican scientists and marine conservation specialists are working to revive an important field of research that could help protect fish populations

09/10/2026

My first spawning of Mikrogeophagus altispinosa a.k.a Clown Ruby Cichlid, or Bolivian Ramirezi! Here the female is seen hovering over her clutch of recently laid eggs, that have been attached to a Catappa leaf. https://linktr.ee/karlthefishguy

01/10/2026

How are species boundaries maintained in the face of environmental disturbance? This is not only a fundamental question in evolutionary biology but also an increasingly important one as human activities and climate change alter habitats and bring previously separated species into contact.

23/09/2026

If they could come and fetch me from the bed, they would
https://linktr.ee/karlthefishguy

20/09/2026

I do love a good Shiro Utsuri koi
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04/09/2026

We're hard at work sourcing the best fish for this season!

stay tuned for updates, dates and more!

See you soon!

23/08/2026

Biologists are searching reservoirs between Columbia River dams for a dangerous predator they hope never to find, testing the water for northern pike DNA.

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Alberton

Website

https://linktr.ee/karlthefishguy

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