Search for information about EI dosing. If you want to use that method you add macro fertilizers 3 times a week and micro fertilizers on the other days. The amounts to add are proportional to the size of the tank. Since you have a tank a bit more than ten times the size of mine your amounts would be a bit more than ten times mine or: 2 1/2 tsp of KNO3 and 3/4 tsp of KH2PO4 three times a week, 100 ml of CSM+B in water mixed at 1 tbsp per 250 ml of water, also three times a week. But, check the writeups here for other lists of dosage amounts, or use a fertilizer calculator such as at the Chuck Gadd site.