PristineBlue to BBB?

[waterbear]

Thanks WBear.
How about the timing? How long with the sequestrant, given a 15K gal. vinyl AG with a cartridge filter, and how much before she hits it with the Cl?

I would use the full dose of sequesterant as per bottle directions with pH adjusted to what the manufacturer recommends. Filter for 20 hours and SLOWLY bring the chlorine levels up and then rebalance the water. Seqeusterants have a way of eating up the TA. Once the water is rebalanced it the time to shock. If the water turns green when you shock you need to add more sequesterant.