I have to Hydra 64 over a 4ft 90 gallon tank.
The par at the top of my rocks where I put my SPS is maybe 230. Bottom of tank 100.
I set the height of the lights by the BRS recommendation.
I am considering lowering the height to bring up the par. No SPS out on the sides.
Does this make sense or is it unnecessary?

The par at the top of my rocks where I put my SPS is maybe 230. Bottom of tank 100.
I set the height of the lights by the BRS recommendation.
I am considering lowering the height to bring up the par. No SPS out on the sides.
Does this make sense or is it unnecessary?



