2 250 MH on 90 gallon, LPS?

[astroboy]

Hello,

 

I just finished setting up a 90 gallon. I have 2 250W Hamilton 14K bulbs and two actinic T5's about four inches above the water surface. Since I'm renting, I really don't want to make holes in the ceiling to suspend the fixture above the tank. 

 

I have LPS (bubble, torches, frogspawn, fox, hammer, and wellsophyillia) in the bottom half of  the tank. Is that too much light for them?

 

Right now I have window screen material underneath the light fixture which cuts down the light intensity perhaps 30%. However, it seems to cut down on the 'ripple' effect you get with metal halides and I'd just as soon get rid of it at some point. I should add, all the corals were in a 29 gallon with 130W of compact fluorescent for two years, so I can well imagine it will take a while for them to get acclimated to the MH. 

 

Any thoughts on 1) will the LPS utlimately be OK in the lower half of the tank, and 2) how to go about acclimating?

 

Thanks!

 

Mark

[hypertech]

I have a 75 with 2x250 and a strip of blue LEDs.

 

Most my lps are fine and growing on the bottom. I do have a frogspawn that isn't growing much but it's six inches from a hammer that is doing great.

 

So, I think the answer - it's probably fine.

[Jason Rhoads]

I think you will be totally fine. I used to have the same setup, but I ran 20,000K MHs and did not run any blues. I had a bunch of LPS throughout the tank (hydnophora was about 5" from the light and grew really well). I doubt you even need to have the screen on there now.