View Full Version : what distance off the water shbould I keep my 250 Watt MH

07/12/2009, 01:11 PM
I just bought a 250Watt MH Pendant and I was going to rest it on my acrylic hood on the reflector shields which would be about 1" above the water.

Is this too close?


07/12/2009, 02:05 PM
Mine are about 8 or 9 inches off the water. I would say 1 inch is too close.

07/12/2009, 02:06 PM
yeah, that sounds a bit too close. most will reccomend running the lights at least 6" off the waters surface. Mostly to help with not transferring too much heat to the water.

07/12/2009, 05:19 PM
I would not put them that close, as they get hot.

My 250 MH's are 7-8" off the top of the tank.


07/12/2009, 05:58 PM
it would probably burn your acrylic hood as well. And if a drop of water splashed up and hit the glass...shatter.