Please only ask a question once, and in your own topic, rather than hijacking someone else's topic. Thanks JasonLion
I think this is definitely the place where I need to start! New to TFP.
Trying to rid the metals/stains in my mother's vinyl pool, 20,000 gallons. Here's what we've done over the last 6 days: dropped the chlorine level down to 0 as recommended. Added 2 containers of Stain Free which worked like a miracle! 1 hour later added 1 container of Metal Free. Vacuumed, backwashed as recommended. Wednesday, Thursday, Friday could not get a good chlorine reading. 100 degrees temps in Cincy this weekend so no chlorine is no good. We wanted to get the level back up. The pool company told us (even though the bottle said to only slightly increase the level of chlorine) to shock, 1 gallon, 2 gallons, 3 gallons... until we finally got a reading Friday. By then, we literally watched the stain reappear on the walls. Bought another bottle of Metal Free b/c we thought the first maybe wasn't enough, added it to freeze the stain from growing. Saturday, the chlorine tested almost 0 again so thought it was a good time to add another bottle of AA to remove the stain that was returning. Vacuumed, backwashed, and pool was blue again today w/no stains. Decided it was best to gradually add chlorine, 3/4 gallon of household bleach every 2-4 hours. After 2 doses, the chlorine was again, barely reading (I know the chlorine has to counter the AA first), and the stain was coming back! WHAT???!!! I'm not sure if the first time we didn't put enough Metal Free in, but after 2 bottles, the metals should be held. She added a 3rd bottle of Metal Free before I left tonight. OR if because we did it in reverse order, Metal Free, then Stain Free yesterday, it didn't hold. Calling manufacturer in the AM!!! PH is low (of course), but this pool MUST have chlorine and I tried to do it slowly and not intensely, like I'd read.