I upgraded my pump this year to a Hayward 1HP SP15922S 2 speed pump. On low speed, the water does not fill the salt cell completely. It leaves the top 1/4 of the cell without water, exposing the very top of the cell plates to no water. This of course turns on a flow light on the salt system. On high speed, the cell is full, no issues. Any ideas? I'm still in my return period and can return the pump if I'm not going to be able to take advantage of the power savings but saving money would be nice!