Please help me just new at this done loads of research but what aye can't put my finger on is ppl say when using the drip system that u use the flood drippers for clay pebbles and the other ones for rockwool and you feed them 3 times a day for 15 min if using clay pebbles and 2 times 15 min if rockwool but my problem is what ones do I use and how often do aye feed them if am using rockwool in clay pebbles please help