My double tail halfmoon has a knack for swimming behind the heater in his tank. It's a 5 gallon. He only does it when the tank light is on (live plants), but I'm worried that he will get hurt. It is currently vertical, but I wonder if horizontal would be better?
I didn't fill out the check list, but I do 25% water changes weekly and use a gravel vacuum. The water parameters are Nitrate 0, Nitrite 0, pH is 7.4, Ammonia:0. The water is 78 degrees