Light placement question

[Sexytang]

I just updated to a 75g from a 40 half moon and only light I have is a 165w blackbox how high off the tank would u place the light at 100 blues and white on just enough for good color. Corals are on the same side as corals. Atm I have the light at 10”

 

[Sexytang]

9” off water line my bad

 

[Sexytang]

Anyone

 

[Betex]

Best thing to do is get a par meter to get an idea how high/low and adjust your settings from there to match the par for type of corals you have. BRS/Pod your reef rents them online or a LFS at times have em

 

[Sexytang]

I had them at 14 moved them to 18 a few mins ago see how things go tomorrow