too much watering man. i say 3 times a day and 15 min each. your hoses' kinda in the way for the plants too, so they may seek other way for light. i suggest you change to smaller and more organized tubes or just modify all the trays to ebb & flow and use rockwool next time, dat way you would be able to manage the plants, move them and using rockwool would keep the girls standing up too, if not, use a tooth pick and strings, just dont tie them too tight.