Forum Title: Opening--What Chemistry Order
5K gal vinyl, with cartridge filter and 2 speed pump Pool was very green yesterday, the bottom was almost/sorta visible. I used a gallon of 8.25% bleach and this morning the FC was 6.4% (using the good test kit &.2 ppm scale) Pool is still green but bottom is visible, added additional 32 oz of 8.25% bleach Will vacuum and clean cartridge later this AM. FC = 10 ppm CC= pH > 8 (required 8-9 drops of reagent to reduce to target level of 7.5-7.8 (that color is hard for me to read) TA =60 ppm CH = 30 CYA = <20 (maybe zero) After vacuuming and filter cleaning, what do I do next, At this stage it is almost a circular equation. Thank you
Category: pool Post By: SANDRA MOORE (Naperville, IL), 02/16/2019

First priority is to get the PH down to the 7.3 to 7.5 range. Remember not to trust the PH test results when FC is higher than 10, so do this at some moment when FC is fairly low. It is much simpler to SLAM if the CYA level is at least 30. I would add enough CYA to raise CYA by 30. That might overshoot 30 just a little, which is fine. Then it is time to SLAM the pool properly, see instructions in Pool School.

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