Need Direction, pool water turned brownish

[wireform]

NOT POOL IN SIGNATURE
So in another thread I asked about metals detection in the water which I know is either iron or copper. I'll run it by a pool store to see what they find but, nothing has changed with this 20k vinyl pool except a cartridge change and a week later the ic40 was replaced due to it being a dud after 6k plus hours. I'm going to check later to to see if somehow a tool was left in the filter housing and that's possibly the cause of the brown water which I somehow doubt is the case otherwise I'll assume it's the copper in the mastertemp heat exchanger falling apart which is also surprising as the chemistry has always been in check. I need some guidance how to rectify the water because this is weighing heavily on my mind being a first and hopefully the last ever with this problem. Any links to similar outcome would be very comforting. What would be the quickest way to turn this water around......
Thanks,
Allan

 

[Texas Splash]

I need some guidance how to rectify the water

That will depend on what the substance is - copper or meal. If copper, the best course of action is to replace as much water as possible to alleviate the metal's reaction to chlorine. If iron, get some polyfill is use right away to try and remove it mechanically. You might get enough captured and removed to salvage the water.