Hi everyone, We are about 10 days post new fiberglass pool fill and have been working on balancing out the chemistry. The pool is clear and clean and we have been using it for the past six or seven days now and everything is been fine however I noticed yesterday that there was what appeared to be a light black film that would raise up and down the waterline with the water and this morning it appears to have dried on to the surface above the waterline.it appears to be coming off with a light scrubbing with a paper towel and while I have read through some of the pool staining threads and elsewhere on the Internet, there are not very many good comparisons with photos. I did do a about 10% water exchange yesterday to lower my salt down a little bit. I also have been lowering the pH and recently had it down to 7.2 to try and lower my ETA and it has raise back up to about 7.6 to 7.7. We did Have some pool toys with a lot of black color for the past two days though we remove them when we are out of the pool. Any ideas? Thanks!
Current Pool Chemistry:
FC: 3.5
pH: 7.6
TA: 160
CH: 110
CYA: 45 (just added liquid CYA to bring it up to 70)
Salt: 3200
Water Temp: 87
CSI: -.150
Current Pool Chemistry:
FC: 3.5
pH: 7.6
TA: 160
CH: 110
CYA: 45 (just added liquid CYA to bring it up to 70)
Salt: 3200
Water Temp: 87
CSI: -.150