I have an update and of course a question. I accomplished a ~33% drain and refill of the pool (CYA decreased from 60 to 40). Not sure how I got so close to my desired result without a math major performing all sorts of measurements and calculus calculations on the pool but I'm apparently a good guesser. I did an OCLT and after performing FC measurement 2 of 2 this morning I decided I wasn't particularly happy with how I performed the measurements but I'm pretty confident the two were within 1.5 ppm if not lower and I plan to be more careful with tonight's and tomorrow's AM measurements.
I consider my algae issue not a particularly bad one. The water never had any shade of green to it. Although I had some light algae growing on the walls that got significant sun my main issue was algae accumulating on the bottom. And I'm pretty confident it wasn't growing on the bottom because if I just waved the skimmer net within a foot or so of the algae it would be whisked off the bottom and stay floating for a period of time. I'm not a chemist and I'm not sure this is the correct term but to me it seemed like this algae was "precipitating" out of the water and dropping to the bottom.
I have been brushing the pool, especially the bottom the past 2 days (and before that) so that the filter can suck up as much as possible. I have read plenty on this site since I started this thread and well know what the end game is (CC < 0.5, OCLT < 1.0 and clear water). So my question is this: The past two days the algae falling to the bottom has decreased dramatically but there is still a small amount. Should I not consider myself done with the SLAM until ALL visible algae on the bottom is gone or if tomorrow AM the result of the OCLT is < 1.0 and CC < 0.5 can I consider myself done?
I guess what I am asking is this: is the small amount of visible algae sitting on the bottom likely still living or is it possible that, although visible, it is dead and will be eventually consumed by the chlorine and filter. I know the answer is probably "why take a chance" and I do not plan on taking that chance but if anyone has experience with this type of "end game call" I'd be interested.
I consider my algae issue not a particularly bad one. The water never had any shade of green to it. Although I had some light algae growing on the walls that got significant sun my main issue was algae accumulating on the bottom. And I'm pretty confident it wasn't growing on the bottom because if I just waved the skimmer net within a foot or so of the algae it would be whisked off the bottom and stay floating for a period of time. I'm not a chemist and I'm not sure this is the correct term but to me it seemed like this algae was "precipitating" out of the water and dropping to the bottom.
I have been brushing the pool, especially the bottom the past 2 days (and before that) so that the filter can suck up as much as possible. I have read plenty on this site since I started this thread and well know what the end game is (CC < 0.5, OCLT < 1.0 and clear water). So my question is this: The past two days the algae falling to the bottom has decreased dramatically but there is still a small amount. Should I not consider myself done with the SLAM until ALL visible algae on the bottom is gone or if tomorrow AM the result of the OCLT is < 1.0 and CC < 0.5 can I consider myself done?
I guess what I am asking is this: is the small amount of visible algae sitting on the bottom likely still living or is it possible that, although visible, it is dead and will be eventually consumed by the chlorine and filter. I know the answer is probably "why take a chance" and I do not plan on taking that chance but if anyone has experience with this type of "end game call" I'd be interested.
CC is 0.5 or lower;