Edit - since this was moved to it's own topic.
I own the SWG/Pump combo for my Intex Pool. It's a cartridge filter and I want to get upgraded to a sand filter. I don't want to have to buy a whole new SWG but instead, just add the pump. I saw other places that people just cut the electricity to the normal pump.
The question I have is how do you run them in sync (the sand pump and SWG)? just plug them in at the same time and set the timers for the same run time like 2,4,6 hours? Can you mod the sand pump to run off the original timer on the original unit by splicing the electrical?
Thanks for any advice!