Help with my EI dosing regime I've been trying to work out what dosage I should start with for my new tank. The tank is about 45l in volume but holds 40l of water, with substrate hardscaping etc. Lighting will be 2 x 36w compact t5 is this too much? Should I use just 1? Iâ€™ll obviously aim for 30ppm of co2. I want to mix up solutions of the dry ferts, this is what I have come up with using for the solutions using a calculator from another forum. 33g of KNO3 to 500ml of water = 1ml of solution adds 1ppm of NO3 to the tank 7g of KH2PO4 to 250ml = 1ml adds .5ppm of PO4 1Tbsp/8g of Trace to 250ml I was thinking of this for the dosing regime - Sunday - 50% water change + 5ml KNO3 + 1ml KH2PO4 Monday - 5ml Trace Tuesday - 5ml KNO3 + 1ml KH2PO4 Wednesday - 5ml Trace Thursday - 5ml KNO3 + 1ml KH2PO4 Friday - nothing Saturday - nothing How does this sound? This is just as a starting point and will change levels if uptake by plants shows excesses of lack of specific nutrients. Cheers.