I drip and I leave it on 24/7 which can be ideal if you have good drainage and the res temp is warm. Warm roots 24/7 = fast growing plants. If you use rockwool just make sure you have a watering once every 4-6 hours as a general rule of thumb. perlite alone/ hydroton can be 24/7. And depending on how good your drainage is you should only have to water coco once a day but I have never been able to over water it. The key is drainage.