Whats up Game, mineralz got it right try not to keep the rockwool too wet it absorbs a lot of water and in many cases will drown out your roots from gettting oxygen. That being said, you dont want your water pump sprayin 24/7. couple times a day for a few minutes until you rockwool gets wet but not soaking wet where its dripping nah what I mean? Also I would get that rockwool a little deeper so the hydoton covers it up or plastic cover net pot cover something a long those lines this will keep you roots in the dark which is what you want and wont get so much of an uneven drying of the rookwool. For instance the top is getting dryer before the bottom of the rockwool so you think ooh I need to water again when you really dont. And mayb a side note you want the roots to "reach" for water especially in the beginning stages so keep that in mind before sprayin her with too much water again
Good luck homie if you got anymore questions as you can see your in the right spot so post away
peace!
