Thank you very much! I have one more question if you don't mind, I was curious what water level... I have a 5x5 square vinyl fence post and am having troubles with water levels.. I have a adjustable o-ring but it's kindof leaky.. I was curious would it be alright if I just put the water level just under the net pots? I read that the best thing about nft is the oxygen the plants get, and I don't want to ruin that with having the water level too high (if that's how it works)