I always just leg my plants into the shower for watering and such...and then after they drain I take them back to the tent...although I have also used empty nursey pots to hold the pots with plants in them off the ground...at first I had all my plants just sitting on the ground and I would just water them, but the runoff would just go back into the other plants...which is no good, so I started the shower, but now i have plants of all sizes and species all using the same light so now most of the plants are raises, but I guess I'll just keep taking the plants to the shower..we have thought about adding in a shower drain in the plant room so I can just water them where they are and the water would drain out under the house.