That amount is about right. I do about 1 gallon water per 3 gal pot. You don't get crazy fast drying with the combo of HP plus fabric? Maybe I'll just start by running HP next grow and then a grow after try plastic pots. I've been using fabric for several years and I've always been curious about using plastic pots with holes drilled under and about halfway up. How soon into veg are you doing the one gallon? I'm about to flip in 2 days and I'm giving only 1.5 gal for all 3 3 gal plants as I was worried about over watering (hence the title lol). Its just tough to find that ideal balance of not too dry but also not overly wet eh.