Hey I just moved the seedlings in rockwool cubes to netpots with hydroton. Now I am confused about how to water them exactly and how often. Should I pour water over the whole netpot or just the rockwool cube?

If so, how much water should be used? Should the airstones be turned on? I dont see why they should, considering the roots are not sticking out past the rockwool very far.
thanks.