WHY don't you follow the link I posted which shows the powder clumping up on the surface?Isn't the answer to "WHY?" that generally the more surface area of a chemical (or whatever) that is exposed to the solvent (in this case pool water) then the quicker it will dissolve. Didn't we all do this experiment in about Grade 8 science? And if that is the case then doing this will cause the CYA to start buffering your chlorine more quickly. Or does it not work that way?
I've had to add CYA twice this year, and it is below my target again. I can vouch for the pool keeper trying to gauge chlorine targets while waiting on that sock to dissolve for a week.Let me be the first to ask, "Why?"
CYA is an annual thing.
Can adding it directly without the sock method also cause damage to the filter, since it is acidic and can be stuck there for I'm guessing at least 24 hours even with it running?Note that putting it into the skimmer directly so that it gets caught in the filter is convenient but does not dissolve as quickly since the flow rate in the filter can be rather slow. The flow rate through sand filters is no more than 30" per minute, in DE filters it's around 2.4" per minute, and in cartridge filters it's around 0.4" per minute. Compare that to a skimmer 10" in diameter (78.5 sq. in. area) at 15 GPM (3465 cubic inches per minute) which flows at 44" per minute. So perhaps putting CYA into the skimmer to a sand filter may work OK, but it will take much longer to dissolve in a DE filter and especially a cartridge filter.