fishead
Member
the temp in my house is 71 all year round but my tank temp is 78 to 80. The tank (75 gal) is built in a wall. the wall is hollow above and below and well ventilated. in the summer i have a pipe coming from the AC duct to blow cool air across the top of the water but in the winter i close it off while the heater is on. there are 2 powerhead moters and a skimmer motor in the tank generating heat and 380 watts of VHO lights that are on 8 hours in the evening. i want to get the tank temp down 5 degres. any cheap ideas? whats your tank temp?