With brand new clones in my hydroton, I flood my two gallon buckets 6 times a day for the first week or so. Than I start taking away one watering at a time. Once they're developing roots well and healthy from the transplant shock, I get them down to three 15 minute floods....one just after lights on, one in the middle of the 18 hrs on, and one before lights out.
For flower, they get two....one an hour after lights on, and one an hour before lights out. They get one one feed during the last two weeks...they really dont need much water at the end. Have fun.