Interesting how you have the lights set up in a 4x4. I've been thinking how 2 lights would work in such a space given the 2.5x2.5 flower footprint.
Well today I gave a feeding of 5.4L mineral water (24ppm), 12mL BioBloom, 12mL BioHeaven, 4mL BioGrow, 15mL AlgAMic (kelp), 1tbsp oyster shell...