This yyear i replaced my old pump with a variable speed. I recommend this to anyone thinking about it, as well as a SWCG. Saved so much money on electric bill, and I enjoyed less chemistry time. Now I still have my old pump, I was going to convert it back to 120, and I wanted to try and set up another filter setup with my spare cartridges for startup. if I can retrofit say 2 filters and make something that can rest in the pool, will I technically be filtering 50% more at the start of the year? i would plumb the 2 filters one say the top, and plug the bottom, and return to pump, then just right back into the pool. Has anyone tried this? Im interested to see any other people who have tried this, if not ill make a prototype and post it spring-time.