- Reaction score
- More than 10 years
Yes as mattgirl says it’s something in the tank. I’d go buy a 5 gal tank and move the fish into it. Clean out you filter and add it to that tank. Than remove everything from the tank. Put each decoration in its own bucket and all the gravel in a bucket. Fill these buckets with new water and empty and refil the tank. Wait a day and recheck all buckets and tank. See what has the ammonia. Also check the 5gal. Right now this is the only way to solve the problem.