Cool my tank!

get as much air moving over the top of the water as you can, however your evaporation will go way up. Can you move your lights up 2 -3 inches?

 

Get a box fan or something powerful and blow it across. You can also float frozen bottles of ice if your home to do it. If the temp stays that high for a long period it will probably wipe some stuff out.

 

Just get a couple clip on fans, 2 on top or one on top one on your sump if you have one. If you have corals, some may suffer, maybe get bleached out, if the high temp is prolonged. I'd really see if you can't prop up those halides further off the water too. I would think if it cools down at night you will be ok. When the tank temp goes up, the oxygen in the water will decrease too, so watch your fish to make sure they're doing ok.

 

Well I would say if you let that go for to much longer at that temp or yo wont have a tank to talk about. What is the temo in your house, do you use Air Conditioner? I run 2 MH for 12 hours aday with no overheating problems stays under 78 but I keep my house at 71. I noticed that if I let my house temp go up even by a couplle of degrees it dramatically changes the temp of the aquarium. I figure the money saved on not buying a chiller would take years to spend on electric bills due to overuse of the air conditioner just something to think about.

 

Make a Chiller. Dorm fridge, plastic hose, pump, floral gel. COIL 20-30 FT of the tubing place in fridge drill holes through frt. door for intake/return. Pack inner fridge w/either floral gel "slimey gelatin that is a good conductor" or dryed beans "cheaper". something to make contact between fridge and tubeing. Close it up and duct tape it shut. Ive only seen it done on a 75, but it really works great... emergengy situations make r/o ice

 

You might wand to look at some of your equipment choices that could be driving your temperature up that much. Common culprits are Mag drive pumps being ran submersed, heater stuck on, etc. Might be worthwhile to look at.

At that temperature I would shut my lights down and aim every fan in the house at it. My tanks are in my garage with 2-250w mh and 2-175w mh on all day. There are up to 5 pumps running at any given time and I never see a temperature spike like that. You might have something else wrong besides a hot house.

 

You could of had a hell of a mess if you had a sps tank. Quick temp swings cause RTN and bleaching.