Hi and thanks for any info....I'm still waiting to hear from Ben about my subscription account so I guess i can't post this question in any other forum until that gets cleared up. So here goes, I have been battling what I only assume is mustard algae By the way it is behaving ( poofs away when you touch it, but then returns to the same spot after some time) my questions are these: should I use polyquat for that in addition to high chlorine, i have been raising it to 15 nightly ....the pool store of course wanted to sell me yellow out? I have read that it is very hard to get rid of, and I am wondering why it keeps returning? How am I reintroducing in back in? I am waiting for the titrating agent for my 1515 kit that I purchased last year so I am relying on an oto for chlorine reading until that arrives.
My numbers are
As of tonight: fc-3
Cc- 0
Cya 35
Ph 7.2
Ta- 70
Water temp 86
16x32 in ground vinyl, sand filter ( has been on for 2 plus weeks straight)
My pool is in the sun for the whole day ...should I raise cya?
I have dichlor powder, and bleach here...
Please advise..
ps I had found last week in The front of my skimmer what looked like white water mold ( jelly like slimy stuff) removed all that and shocked to 20 for a few days...I am at a loss I feel like i am spend so much time trying to figure this out. Thanks again for any info.

Natalie