hello i woke up this morning and found ont of my zebra angels up in the corner with one of its fins not moving i have had it for about 3 months now and never encountered this before. Does anyone know whats wrong? It is a 120 g tank and i do 25% water change every 5 days, they get fed flake food in the morning brine shrip at 9 and blood worms at 11. The temp is at 78