It's been quite a process getting to blue (and a lot of bleach), which I'm thrilled about, but FC didn't hold on my overnight test. FC was 18.5 last night and 15.5 at 7am this morning.
Do you suggest I hold the shock at 19? I originally had a shock target of 12 when I thought it was green algae, but discovered it must be mustard algae that was hard to get rid of so I've been targeting shock at 19....and it finally turned blue but is still cloudy. I can see to the second step at the pool entrance. There is a lot of sediment at the bottom and on the steps..is this normal after getting rid of all the algae? Is it the dead algae or could it be DE as well? I cleaned the filter last weekend and added new DE.
Due to the drop of 3ppm is morning, do you think the sediment is absorbing the FC or could there possibly still be some algae or other contaminants hiding causing the FC drop?
Stumped as what to do next. I would like to vaccum but I can't see the bottom. I could put the Turbo Shark in to clean the bottom to help.