Madams7499

New member
Jun 17, 2022
1
Massachusetts
Pool Size
36000
Surface
Vinyl
Chlorine
Salt Water Generator
Over a period of two weeks I’ve followed directions for lowering my PH and adding a sequestrant for iron and copper, waiting 24+ hours and then slowly raising PH up and adding chlorine. I’ve done this twice and every time I add the chlorine my pool gets dark again. What am I doing wrong?

My cartridge filter runs 24/7 and I rinse often. It’s a 20x40 vinyl in-ground pool with a SWG. I because of all this I still haven’t been able to increase my salt level (it’s at 1300) because I’m scared it will make the pool worse at this point.
 

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Welcome to TFP! :wave: I'm pretty confident you have iron. Are you on a well? Have you ever tried to filter the iron with polyfill material, either in the skimmer or through a separate bucket? See the link below as one example.

What makes you think you have copper? Copper is usually from pool store products or eroded plumbing/heater elements.

Also be sure to update your pool signature. See mine as an example and tell us how you are testing your water.

Also see Pool Care Basics.

 
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