well, that is a little 'sweet' but how much water to you average per plant?
In 3.5 gallon pails that have been established (been in the pot for over two weeks) I'll use a quart of water per feeding. They take more in the middle of the veg/blom cycle (as much as 2 quarts) and less as the leaves drop off later in bloom. I like to see the plants go dry (need watering) every 2-3 days. This is just how I like to do it. Your results may be different.

My brother had the same plants, same soil, same light, just slightly cooler, yet a comfortable temperature yet he put his plants in 5 gallon pails and overwaterd to the point that they didn't need watering for weeks. This really effected his grow. The plants finished three weeks earlier and had a fraction of the yeild and the quality was off (due to the shorter grow = less trichomes). Water less quantity but more often.

.02