- Joined
- Jul 29, 2019
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It looks like fin rot to me. And also what size tank is he in, and did you cycle the tank before putting him in? What are the parameters ammonia, nitrite, nitrate, and ph?
Change his water every day for a few weeks. Drain out most of it and leave a little bit in the bottom for the fish, then fill it back up with dechlorinated water.
Do you have a filter in the tank?