Is this true? I'm getting ready to set up my 4 site again and I was good and blazed laying in my carport where the room is and was enjoying the pump hum. I wouldn't mind getting rid of it my only concern is what happens if I get roots clogging and had to turn recirc pump off? They'd be toast in hours. Also i just bought like 200 foot of airline and I'd have to come up with a diy to use it all.