About GoodFishTank
Last updated September 28, 2026
GoodFishTank is a guide to freshwater aquariums, tropical and coldwater, for beginners and intermediate keepers: cycling, water chemistry, common problems, easy plants and popular fish, shrimp and snails.
Who runs it
GoodFishTank is a one-person site, written and run by Manel Vadillo from Andorra. Manel keeps freshwater fish at home and checks every answer against the research before writing it down.
There's no company, staff or sponsor behind it. When a guide says "we", it means the site.
How guides are checked
- Every number links to its source: extension services, government agencies, veterinary references and peer-reviewed papers.
- Calculators show the formula they use, so you can check the math.
- We say when something is an estimate or our own inference, not a measured fact.
- When sources disagree, the guide shows both sides.
The editorial policy has the details.
What we don't cover
Saltwater, reef tanks, ponds and koi, and large or expert-only fish.
How the site is paid for
Right now it isn't: there are no ads and no affiliate links. We plan to add display ads and affiliate links later. When that happens, the privacy policy and affiliate disclosure will say so before it goes live.
Not veterinary advice
Guides are general information for hobbyists. See the terms and disclaimer.
Contact
Corrections, questions or anything else: contact page or hello@goodfishtank.com.