Quote:
Originally Posted by jimw369  4" is pretty close to the water for MH. T5s yes. MH probably not.
Heres my list (seeking Pogodzibs approval of course):
move tank to room where no sunlight comes in
Raise light fixture
put tank in basement
fan blowing across top of tank
fans in hood
Fan on sump
Add more fans and in case of fan failure...float frozen 2 liter bottles of water in sump(emergency measure only)
Make your own chiller from an old refrigerator(some have done this I have not) |
My MH are about 4" off the water, which is fine as long as the bulbs are enclosed within a fixture. If the bulbs are open to the water, 8" is a much better distance.
I agree with Jim's suggestions for keeping a tank cool, plus:
Lowering the temp in the room with the tank via an air conditioner
Shortening the MH light cycle (4 hours is plenty for corals)
Running your RO unit's feed water supply line through coiled tubing in your sump
Run your tank water through a large, trashcan filled with your fresh makeup water (assuming that your home's temp is the same or lower than your tank water)
And yes, if your house's temp is at 75 degrees, fans should be enough to keep your tank water temp down with that lighting.