flood it 3x during lights on while veggin', none in dark. got lots of ventilation, like 1200cfm total. remote resevoir outside the room to keep it cool. ph btwn 5.2-5.8 used bc grow during veg due to access, went to pbp for flower. during flower only flooded 2x with last @ least 2 hrs prior to lights out. flooded longer though. vegged w/1000MH then flowered with an extra 1000hps. took clones from 3 different mommas' but wont do that again had 3 diff. phenos which finished 3 diff times for 3 seperate harvest same table.(pain in the ass).vegged for 4 days but thought that this was about 2 days too long. have done several grows since w/same set-up & think we've dialed it in. we only veg for about 50hrs then flip it to 12/12 much more managable!