Single mom 18000 gallon, de filter chlorine pool w hot tub- old school plaster

[Watermom]

You can just use some string to wrap around the sock and then wrap the string around the top edge of the pool or use some duct tape or something. Or, just pour it slowly into the skimmer while the pump is running and then keep your pump running 24/7 for 4 or 5 days after you add it and don't backwash during this time. About a week after you add it, run the CYA test again and report your number.

Glad the water looks good. Hopefully, we can help you keep it that way!

[BigDave]

@Watermom: OP has a DE filter. Do you recommend adding CYA in skimmer with a DE filter?

[Watermom]

Better to put it in a sock in front of a return.