Lower or higher PAR

[Anthrax15]

My tank is 4 months old at the moment. Dimensions are 36x24x18 Lagoon style tank. I am seeing coraline algae growing all over the tank but not the back wall or glass oddly. I have plenty of coral but am seeing very little growth, if any. A little growth from a Green Slimmer Acro, Watermelon Chalice, and some Pink Diamond Zoas. Aside from that, mostly everything is stagnant. Most coral has been in the tank for over two months.

Tank parameters are:

Salinity: 1.025 - 1.026
Temp: 77.5 - 78.0
PH: 8.1 - 8.3
Nitrates: 5ppm
Phosphates: 0.07 - 0.14
Calcium: 410 - 420
Magnesium: 1425
Alkalinity: 8.5 (rock solid)

Lights are 2x AI Hydra 32 HDs

I have measured both my current light schedule and one with the intensity increased using an Apogee PAR meter. Would it be beneficial and would I see possibly increase in growth going from A. preset to B. preset? Or should I continue with A. preset and allow the tank to mature more?

A.)
B.)

 

[P-Dub]

Bump it up and see. Just do it SLOWLY. I would make the change over a 30-60 day period. Monitor and see. Your tank is still VERY young and you should expect to see things happen regardless of what you do with the lighting.