My tank is all cycled and ready to go, but since yesterday the temp in my tank is droping. :roll: It's gone from 90*F and now is 75*F. The heater light is on, and when I touch the heater is feels warm/hot. When I did the huge water change last night I had to add cold water since it came from my garden hose. So I know its working at least some how because the water was warmed up several degrease from when I put it in last night. Please note that the temp in the tank had dropted around 10* before doing the water change. Advice? The heater is a 250w Jager.