Drain and refill 33,000 gallon gunite pool

[famousdavis]

But if you haven't bought the chlorine test kit as previously advised, how else can this forum help you?

[aylad]

Five gallons of 6% bleach in 33K gallons will only raise your FC to 9.1 ppm. With a CYA of 40, your shock level should be 15 ppm. So...if you'll add enough bleach to get your Cl at least 15 ppm, and hold it there (which is going to require testing and adding more bleach to maintain at least 15 ppm), the pool will clear. If you're only keeping the Cl around 9, you're wasting both time and bleach. In your pool, each 1/2 gallon of 6% bleach raises your Cl by 1 ppm, so you can use that to figure how much to add back each time you test. Once your stabilizer dissolves, and the CYA goes up, so will that shock value. Bur for now, if you want it to clear, get the chlorine level up where it needs to be, keep it there by testing and adding more chlorine as many times during the day as possible, and keep your pump running 24/7.

If you added 12 lbs of stabilizer, then your CYA is about to go to up roughly 80 ppm, so that shock level raises to 20 ppm. If you haven't completely dissolved it yet, I would pull the remaining stabilizer out (or backwash it out if you put it in the filter) until you get the pool cleared, and THEN raise it back up to 80 ppm.

You can clear the pool by Saturday, maybe not to sparkling but at least to okay for a party, but it's going to take a lot of bleach and a LOT of consistency on your part.