New here so be nice 
. I’ve had stained walls that go all the way around our pool since April. At the time we had a “pool guy” and as he was unsuccessful at solving this problem along with some other small issues, we decided to do diy pool care and let him go. We have had crystal clear water all this time so no “green pool”. It does not wipe away or brush away but when I’ve used a chlorine puck and scrubbed back and forth in one spot, the stain lightened up making me believe it’s organic. Also, around the skimmers have stained and if I use my fingernail to scratch at the stain it comes off but won’t come off with a pool brush. It seems I’m noticing more orange/rust random looking stains on the bottom of the pool too. I have not used the vitamin c test yet on those. I’ve began the slam process two and a half days ago, brushing before I started slam and have brushed and vacuumed it the last two nights. It doesn’t look like the stain is budging at all off the wall but again when I scrub scrub scrub with my finger in one spot it seems to lighten up. I know the slam curriculum and the passing of the three points. With that being said, The kids are dying to get in the pool as I haven’t let them since I started this process and am wondering how long should I continue this slam until I just give up and live with the stained walls and let the kids swim. I’ve already dumped a total of 14 gallons atleast of liquid chlorine into the pool to keep it up at the recommended slam level according the TFP calculator which is 24. I am attaching pictures as well.P.S. I turned off the filter long enough to take clearer pictures.
36,000 gallon pool
Before starting slam
FC 7
CC 0
CH 250
TA 60
CYA 60
