Aquarium guides for beginners

Fishkeeping, made simple.

Clear, honest guides to keeping your fish healthy and your water right — written for beginners, checked against the science, and never overwhelming.

Start here

Pick a topic — each hub begins with one complete guide.

Why Finned Friends?

Every guide is researched against current aquarist and scientific sources, dated when it was last reviewed, and honest about what we don’t know. We’re enthusiast-researchers, not veterinarians — and when your fish needs a vet, we’ll say so plainly.