Howdy abadtrip, my current grow is in it's 7th week (4th week of bloom) with three plants in each 10 gallon reservoir (use capacity of six gallons). They have been using a total of 2 1/2 to 3 gallons per week, per reservoir. The last grow got up to four gallons per week for only one plant per reservoir. My grow space temperatures range from 68°-72°F at night and 80°-85°F during the day time. The humidity stays around 40%-55%.