Quality drain, small opperating window.
It works fine at first, but because of the small size and the fact there is always some leakage down the drain tube there is a very small window to tune the pump feed to the grow bed to get the syphon to stop reliably.  It is "working" at the moment on a brand new system but I have my doubts on how well it will work once the system is up and running with plants and fish.
Rating: 3 stars