My drips are full open and run 24/7. Lava rock or grow rocks don't hold enough water to last more then 4 or 5 hours. It will dry out quickly and then the plants will start to use up stored energy in the leaves. Ebb & flow type of system are different. 15 on 90 off is not bad, but it depends on the temperature and how fast the grow rocks dry out on the bottom.
Zandor Reviewed by Zandor on . drip watering , Hydro question could someone tell me the difference , advantages , disadvantages to drip watering in hydo on a continuous watering and drip watering for 15 minutes every couple hours 4 or five times a day ? Zandor do you recommend keeping a drip watering system on 24/7 ( when the lights are on that is) ? ( you don't water with lights out do you ? or do you?) Any responses appreciated. Thanks Bill :p Rating: 5