I was also looking into the Liquidator and have a VS pump. From what I understand, this is one of the disadvantages of the Liquidator compared to a Stenner. Since, the Liquidator will always be dispensing when the pump is running, you will get variable amounts of chlorine depending on the RPM of the pump....making it hard to tweak the settings. I run a low RPM for filtering and a higher RPM when the Polaris is running so I think I will run into this problem.