Cheap option for linking a second salt cell

[Lownerpool]

Hello, first of all I’m a newbie but I do have people that can help me.

I bought a 2nd salt cell (compupool 3 salt cell grc/j40-3) becaise I was told you can’t them together and use 2.

My system is the jandy aquapure aqualink that I have my first compupool salt cell hooked up to. I believe it’s an older model aqualink but it works well.

Anyway I found out to hook up a second salt cell I need to buy a second system. My question is very simple; what would be the cheapest system I could hook my compupool up to. Are there things much cheaper than aqualink or should I look on eBay? Since aqualink goes up and down on salt generation up to 100% this second system could just turn on and off and I could dial my needs twitch my aqualink if that’s even a consideration. Any help would be greatly appreciated.

Thank you

David