I’m new to hydroponic gardening. I have my indoor tent setup. I have two Toad LED lights. I have 4 five gallon VIVOSUN buckets with drip circulation ready to go and they have the small brown/redish pebbles for planting. Right now I have two sets of tomato plants in dirt pots that are about 3 inches tall, most of them anyway. When would they be ready for transplanting from the dirt to the hydroponic buckets? Any advice on how and when to do it? Is there a group or forum that I can join that gives advice on hydroponic growing?