m0useanswered grow question 3 years ago I'm not a hydro guy, but if your water is aerated it could run 24/7 like other setups. but every 10 min for 2min should be good as long as its wetting everything.
the clay balls don't hold a lot of moisture.
Guessing when they get bigger they will want more.
Hopefully a hydro head chimes in and can give more solid advice.
Good Luck!