I have a 15x30 above ground pool with a new replacement liner, not exactly sure what brand or thickness. I just want to verify that adding bleach is safe for the liner. It's probably a coincidence (pollen season?), but the last 2 times I added bleach (use Pool Math) to raise FC to 3 there was a spotty film on the surface like something flaky floating a few hours later. I've ordered the TF-100 for a more accurate reading, but I know the FC was .5 or 0 from the tester I have (almost clear test result). A few hours after testing, the FC was 3, the desired level.
Anyone have any ideas?