I noticed this in my pool this evening. If it is BA, I have no idea why. The only thing I've done in the last 2 weeks is add Borates. I got in the pool with a Scotch Brite and tried to remove it with my foot, no luck. I went down in the water with my eyes open, but I had to flay around so much to stay under, the water was too turbulent and I couldn't get a good look. It's in the shallow end, about 4 feet of water. Feels kinda rough. I hope nothing is eating at my fiberglass
My numbers this evening:
Salt 3240 per strips
2600 per Pro Logic
My FC is a little high cause I think my DPD powder was bad and I kept getting 2-3ppm readings. Used some fresh today and it was 6.5.
I'm doing an overnight FC test tonight. Will know in the a.m. about it.
I didn't get very aggressive with the Scotch Brite cause I didn't want to damage the gelcoat.
What do y'all think????? How do I get rid of it???? Hope you can see it on these pics.