Mine are close to a gallon a dayFed the big gals 1.75 g A and 1.75 B then just added water back to the gallon or so that was left in the 5 gallon and watered the smaller ones with That. So theoretically it should be around half a gram a gallon or so of a and b. Also .4 grams of sea-k per gallon. I am going to have to start watering the big girls once a day I think. They were pretty thirsty today when I fed them.