MH making water 85F

[Mr. Eko]

I just got my 250w 20k XM MH pendant that is 8 inches from the water of my 30 gallon. When i get home from school i check my thermometer and it reads like 83-84. At night it is 78-79. That is a huge temp flux that my corals cant handle...how do i get this down on my 30 gallon.
Someone please help soon because i gatta go to sleep :eek:
Thanks!
:eek1:

[marinelife]

Fan blowing across the top

[staticxtreme]

250 MH for a 30g? That's a lot of lighting for such a size tank isn't it? (that's really a question, I'm not sure) Maybe you could try raising the light even higher from the tank like maybe raise it 12-15 inches over the tank.

[Mr. Eko]

Okay thanks Marinelife, thats what i was thinking.

staticxtreme- 250MH for a 30g is not that much. Actually i think that it a perfect amount, becuase i plan on keeping SPS and clams when my tank stabalizes.

[JJ70]

a fan across the top of the water should lower it by a couple of degrees. Let us know by how much.

[Scuba Dog]

Raise your pendant up some...a couple of inches anyway....

[CrystalAZ]

And put the fan on the same timer as your MH, so the temp doesn't change a lot at night.

Crystal