Lighting Help reefLED 90

[uralias]

I have a BioCude 30gal,, Do i need to run 100% blue or since tank is not but 17' deep should I lower to like 75%?

 

[Cwentz758]

What kind of corals are you keeping. You most likely don’t need 100%.
I have two LED 50s and max I run is 50% (unsure of what par I’m getting) but I feel 50 is very bright. I soon need to invest and rent or borrow a par meter just to get an idea.

 

[Cwentz758]

Also if you look of the Red Sea website at the fixture they have a general par output chart based on mounting height and distance below water. You have to assume that chart is based on 100% though.

 

[Streetlamp]

I wouldn't I killed some corals at 70% start low 35% and work up slowly. I'm only at 57% blue and everything is healthy.