#55gal

My first tank. Tank set up on 4/26/22, used Dr. Tims & Ammonia. Added 2 Clownfish on day 38 (had been reading 0 Ammonia & Nitrite for 2 weeks). Did my big water change before adding the fish. Probably 4-5 days of the clowns in the tank I noticed 1 had a small bump on his gil/side of face. Fast...