maintaining 1-2ppm is what im trying to achieve.
my 10lbs pressurised co2 is maintaining at 25 ppm. Having 4x54W parabolic reflector for every tube. Although in terms of WPG , i have below 2 , but im 100% sure that most of the light made it into the tank. So High- Light.
According to Rex " For dosing KH2PO4 you need to mix 7.2 grams or 1.5 teaspoons or 0.50 tablespoons into 250 ml of water. Each ml of this solution will 0.53 ppm of PO4 in 10 gallons of water. "
say , mine is 120gallon tank water. Does that mean i will need 12ml of the solution to raise 0.53ppm of PO4 ?