temp
 

ihave had great success with a mean average temperature of 80 degrees. I never let it vary more than 2 degrees either way. so 78 - 82. Living in the okanagan, temps swing wildly and i run three 250 m/h's (space light style) so i was expecting problems. Use a 250w heater in the sump and one in the tank all winter it is very stable. during the hot months i mount a fan between the lighting and waters surface. Only drawback is about 4 or 5 gals of top up every night