halide height?

[first timer]

i recently bought a new fixture & i was wondering how high it should be placed. i have 2 150w metal halides(14k), & 2 54w actinic T5's on a 75 gal. i have mushrooms, leathers, lps, some sps, I will be getting acro's & clams soon.

 

[acrylic51]

I would try to mount them at least 10" above the tank......should wait a bit on the acros......especially on a new tank.