MH light height.

[Scubareefman]

Currently my 250mh radium was about 5 inches off the water. My tanks 36 inches tall. how high off the water should I be running? I have no bleaching, but I see other tanks with the light like a foot off the water. Just wondering.

I'm running

1x 250w MH radium 8 hours
1x 24w T5ho coral plus 8 hours
1x 24w T5ho antic plus 8 hours
1x 150Wide 14k Kessil LED 3 hours midday and 1 hour sunup and sun down.

My corals all seem to like the light but I have one acan colony that's not happy regardless of what level.

The tanks going to be Monti heavy with a few hardy othrr SPSs.

Just wanting to get a fun discussion going.

 

[mpcart]

MH light height.

36" is a very tall tank so maybe lower lighting works just fine. With a tank that tall you should be able to find a place for everything and not need to adjust your lights.

I run my 250 MH at 14" off the tank but my tank is only 25". The 14" wasn't calculated or tested. It just looked right.

-Mike

 

[kegogut]

My tank is 30 inches deep and I have my fixture 6-8 inches off the water. Thats using the legs that came with the fixture.

 

[Schplitter]

Mine is 31" tall and the 250w MH bulbs are 12" off the water. I would raise them a little if I could just to let the heat dissipate better.