I have been trying to figure out a way to bottom feed with my Air-pots. With how big the holes are i feel i would just have a slurry of mud come pouring out if i were to bottom feed. Also the way the air-pots are designed is that bottom of the soil is a good 3 inches from the actual bottom of the pot, meaning it would take a lot of water to just get the water to bottom of the soil. And since i use jugged distilled water that would not be economically good for me. I need to get my RO water system so i do not have to buy water anymore. It can get pricey when the little ones get big!!! I use almost a gallon of water per watering lol!!!