Im hoping someone here can help me determine what this stain / algae is and give me some advice on how to get rid of it.
At first glance I got nervous because I thought my liner was fading really bad in the low end corner. But after staring at it forever, I dont think its fading... The liner is only at the end of its 2nd season and I dont put bleach anywhere near this area. I put the bleach by the return in the deep end...
It seems to limit itself to just this one area in a corner of the shallow end, but I think I see a bit around the parameter of other areas of the pool.
I know you will probably ask me for my different levels... And all summer I kept them perfect. But since its so cold here now, I dont bother ever testing. I just dump a bottle of bleach in every now and then and run the filter. The water is pretty clear (although far from perfect)... Im closing the pool in 2 weeks. Water temp is in the low 50s.
The annoying part is that I scrubbed and scrubbed this area with a brush and it doesnt seem to be helping at all. So I put about 2 x 1 gallon jugs of 12% bleach in 2 days in a row... Again without taking levels. I know this is blasphemy here, but when the summer is over I get ultra lazy
Pics are below. I know it will be tough to tell from a picture but thanks a million for trying: