Cannot maintain FC levels w/ BBB

[Slachey]

PoolDoc,

So I took your advice and increased my FC to ~ 34 ppm before I left on a short vacation on 7/2. During my vacation I had someone come over on 7/3 and add 3 jugs of bleach to keep the FC high while I was gone. I was not sure what the FC was during this time, but on 7/4 when I came home the FC was 22. Fast-forward to last night at 8:40 pm (a little past sunset) my FC was at 11.2. When I awoke and tested at 5:30am the FC tested at 12??? This was a bit odd, but after I returned at 11am and tested again the FC was at 11.0. I added a 121oz jug of 8.25% bleach at this time as I was not sure if things were completely cleared. I just tested at 8pm (a little prior to sunset) and the FC was 12.4.
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I don't want to get excited just yet, but I think that I may be on the right track here as the bleach consumption has gone down dramatically.

I'll keep you informed as to my progress.

Thanks again for all your patience!

Slachey

[PoolDoc]

Unfortunately, mustard algae tends to be persistent. Brush the pool as thoroughly and carefully as you can. The goal is to scratch off the slime that protects tiny algae pockets and expose them to chlorine.