In order to replace my Rainbow 320 chlorine tab feeder, I've been looking at the Liquidator (which seems to have problems with variable speed pumps and requires hooking it into the suction side of the pump) and the Stenner pump with associated tank. After much to'ing and fro'ing with the Stenner folks, I have discovered the tanks they recommend have tank lids that allow air into the tank while the pump is on (to compensate for the suction caused by the pump). When the pump is off the chlorine is essentially open to the atmosphere. If I were to use this system, I'd like a tank that has some sort of check valve that allows air in when the pump is on and closes when the pump is off....preventing the chlorine gas from just bleeding off ot the atmosphere. Anyone got a system set up like that?
Perhaps it's time to look into an SWG system...?