I am trying to get some clarification on what replacement cell I need here. We bought the house in October and had the pool open recently. We are in NY and the water hasn't been above 50 once so, I know that is why the cell isn't generating. It has been cleaned but I am positive it is at least 5 years old. The system is Hayward H-40 and I am just having a hard time figuring out which cell to buy because I see they have the GLX ones and others. Lots of options on Amazon. Would need T-Cell-9 as that is what is in it now.