I figure I have about 100 gal
of water with my tank, sump and fuge. I bought a Rena Cal Excel 300 watt heater and I also have a 150 watt heater as helper/backup. I do get some heat from my MH
's but I try to keep my tank at 82. My tank will be 80 in the mornings and will hit 84+ at 10 PM when the MH
's go off. Weird things is the heater light will be on when it is 84!
My heaters are in the sump and I have a digital thermometer in the display. I have 2 80mm fans blowing out the top of the canopy and I have a 120mm fan blowing in from the back at water level.
I feel the Rena Cal heater is messed up but with the heaters I have, should this be a problem keeping up? The high temps I am working on but the low temps are driving me crazy. I adjusted the temps up yesterday but ended up with 86 degree water when I got home! My room temp is 70-72.