I had to leave with little warning and left my tank on. It’s new with water sand and rock only. 90 gals with 50 g sump. I don’t have top off installed yet. We can’t get back into the evacuation zone for at least another day. What will happen if I get too much evaporation with no top off? Will the motor just burn out? I’m new to the whole sump setup. I had a 29 bio cube before that burned up in the last fire. Help appreciated!!

