Hi I am looking into the EI Dry Fertiliser Method where I make my own stock fertiliser. I am a bit confused on how much to dose etc. My tank is a Juwel Vision 180 litre (Approx 45 gallons, although properly less with substrate, plants, decor in etc.) It has a high lite unit running Juwel 35w T5 flourescent bulbs (with reflectors) One bulb has a kelvin rating of 6700 k and one of 9000 k. I was planning to leave them on for 10 hours aday, however I have been told by people to start with only 6 hours aday for a new tank and then increase as the tank gets established. Agree? I will have some kind of nutrient rich substrate either Eco-Complete, Seachem Flourite or Tetra Complete Substrate. Undecided as I want sand on top. With the lighting system I have it only gives me 70W which is roughly 1.5 wpg. So should the lights stay on longer than 6 hours intially? I will also be adding Co2 to the tank. If I am to do this method then how much EI diy fertiliser would I have to dose? Someone has suggested 27g/ 4.5tsp KNO3 9g/ 1.5tsp KH2PO4 72g/ 12tsp MgSO4 (This isn't always needed, it just depends on your waters Mg content) Add these to 600ml of water & dose 50ml 3x per week. 18g/ 3tsp Trace elements (CSM+B) Add to 600ml of water & dose 50ml x3 per week. Would this be suitable for my tank or is it too much? Also how much water would I have to change and how often?