Tested my pool and it was at 5 and ph was at 7.8 and cya was at 35. Still had an algae problem so I added some phosphate remover. Ran it for 24 hours and then checked and the chlorine jumped to 13. Does phosphate remover affect a SWG? Any other ideas? I turned off my SWG to get it back down to normal but can't figure out why it spiked. Thanks for any help.