The previous reviewer discussed the autopot xl system with fabric pots, which I also have lots of experience with. It is an excellent system, especially with water only soil grows. I have used the valves on the xl system, as well as a number of diy subirrigation setups with larger containers (10 gallon fabric, and ~100 liter totes. The system is efficient and effective. Take note though that if using salt nutes, you must keep EC levels lower than you may be used to, and preventive top wateri...