So I got my drip irrigation system installed, and it's running great. The drought here is still bad and getting worse. Chances are good that they will upgrade form a Level 2 to a Level 3 drought next week. I want to minimize my water usage, to protect our well, while at the same time watering the tomatoes enough to get a good crop. I have 18 tomato plants, all paste types - mostly Roma & San Marzano. The have all set fruit (currently marble to golf-ball sized) and are still flowering. Each tomato plant has a 1-gallon-per-hour dripper. So - how many gallons per day should I be giving my tomatoes? Thanks!