I was told on the lps forum to list parameters and such. Makes sense. Dkh @ 8.7 ( salifert) calcium @ 400( salifert) ph @ 7.90 in the morning, 8.10 by the evening ( rkl w/ph probe) everything else at 0 except phosphates(<.25) according to API test kit, but I just bought an elos kit so we'll see. And I have 8 t5 ATI bulbs on aquatic life fixtures. Plenty flow, etc...