OK well how do i test for phosphates, Ca, and Mg? How much water should i change, the tank is 75gal
Here is what i tested:
PH: 8.6-8.8
ALK - 0-1.6
NO2 - 0 p.p.m.
NO3 - 5 p.p.m.
NH3/NH4 - .25 p.p.m.
I have 2 65w Blue 6500 Bulbs and 2 10k Bulbs, Lights are 4 months old
Flow is 400gph pump on...