About
About Finfern
Finfern is a warm, judgment-free home for freshwater aquarium keepers — honest, up-to-date care that starts with the water, so you can tell when your tank is fine and when something genuinely needs fixing.
Why Finfern exists
A dying fish is almost never a fish problem — it's a water problem, and the cause is invisible until you know what to look for. Most people are sold a betta in a bowl or "just add fish" with no mention of the nitrogen cycle, then blamed when it goes wrong. So it's easy to lie awake at 2am wondering“is this normal, or is something wrong?” — and easy to feel silly for asking.
We built Finfern to answer that question kindly and accurately: to teach the water first, to tell normal from a genuine red flag, to correct the old myths gently, and to make keepers feelwelcome and capable, not judged. It's a sister brand toBognook (our amphibian home), and it runs on the same principle — a cozy shelter for the people who love these animals. Nothing to sell you.
What we promise
The rules we hold ourselves to on every page:
- Current husbandry, not folklore. Fishkeeping has moved on fast. We teach the up-to-date, evidence-based standard — and we correct pet-store myths kindly, never making you feel bad for having believed them.
- We fact-check before we publish. We never publish a care number — a tank size, a temperature, a water-parameter range — until it's been checked against an authoritative source. Right now30 of 30 species are fully sourced.
- We triage; we don't diagnose. We help you spot what's normal and what needs attention — but we're not a substitute for an aquatic vet, and we'll always tell you when to see one.
- The water comes first. Most "sick fish" questions are really water questions, so we lead with the cycle, the parameters, and the test — never a guess, and never a quick fix that ignores the root cause.
- We're honest about what we don't know. Our health articles say plainly when they haven't been vet-reviewed, and we'd rather be conservative and honest than impressive.
The full detail is on our editorial standards page.
Who writes this
Finfern's guides are written by The Finfern Team — keepers who research each topic carefully and compile it from the best husbandry and veterinary sources available, written to a consistent writing and fact-checking standard. We are enthusiasts and researchers, not a veterinary practice. Where a topic needs a vet, we say so and send you to one.
We're working toward named expert and veterinary review of our health content — when a qualified aquatic/exotics vet has reviewed an article, you'll see a “✔ Reviewed by” line on it. Until then, we're upfront that our articles are team-written and fact-checked, not vet-reviewed.
Talk to us — and tell us when we're wrong
Good care information should be accurate, and we take mistakes seriously. If you spot an error, or you think something's out of date, please tell us — we'll check it against our sources and fix it fast, and a correction only makes the guide better.
Or read exactly how we research & fact-check.