Please Help! Tail fin damage
My betta, Iron Man, seems to be nipping his own tail into oblivion. His tank has no rough decor or small, sharp spaces he could be snagging on. (Full tank photo in second picture).
Tank has a filter and heater (79F). 30% water change weekly. Thrive fertilizer and Stress Coat used at same time as water change.
Parameters are good. Ammonia/Nitrite both 0. Nitrate around 5-10. pH is 7.6ish. Checked via API Freshwater Master kit.
u/CaydenVierra — 23 hours ago