Why the sock?

keithw

Well-known member
Mar 30, 2007
305
Virginia Beach
I need to add CYA to my pool. I believe that I have read in other posts where people put the CYA into a sock and tie it near a return. Why? Can't I just broadcast it into the pool?
 

AnnaK

TFP Expert
Platinum Supporter
LifeTime Supporter
Jul 15, 2007
1,138
Eastern Pennsylvania
CYA can take up to a week to fully dissolve. If you broadcast and the granules sink to the bottom, you or your automatic cleaner will likely vacuum them up. If they stay on the surface or get suspended in the water, who wants to swim in that? Besides, they'll eventually get pulled into the filter and backwashed away.

I put mine in an old sock, knot the top, and drop the bundle into the skimmer basket. That allows me to lift the CYA sock out when the basket is cleaned and drop it back in. I've actually never had it take a week to dissolve but I only ever put 1/2 cup at a time and test the CYA level some days later.

Anna
 

Backglass

Well-known member
Jun 4, 2007
146
Putnam County, NY
momof2grlz said:
I put mine in my leaf net attached to the pool pole then lay the pole on the deck with the net hanging in the water near a return. Works like a charm.
Interesting method but CYA is Acid after all...I would think that a pile of acid would potentially weaken the netting. I just hung my sock on a string by the return.
 

Poseidon

Well-known member
May 24, 2007
148
Houston, Texas, USA
I read many times about adding cya with the sock/pantyhose method. Why not just pour it straight into the skimmer? The granules will get trapped in the filter where they will dissolve much quicker (with pump running of course). Just don't backwash for a couple of days or else you'll backwash it out and have to add it again.
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,879
Silver Spring, MD
It is common to add CYA first thing in the spring when openning the pool. Half the time there will be lots of algae and no CYA. Fighting the algae requires backwashing frequently, so the CYA can't go in the filter. By the time everything is back to normal and frequent backwashing is no longer required there is rarely any need for more CYA.

The other thing that happens is that people don't expect to need to backwash so they add CYA to the filter. Then two days later there is some sudden reason to backwash and the CYA is forgotten about, so the half or so still left in the filter goes down the drain.

It ends up being simpler to always use a sock, instead of trying to remember that you shouldn't backwash.
 

DaveNJ

LifeTime Supporter
May 22, 2007
520
Toms River, NJ
I had an extra roll of sock material that goes over drain pipe. Cut the length I needed knotted it and set it in the skimmer. Worked pretty well.
 

Poseidon

Well-known member
May 24, 2007
148
Houston, Texas, USA
JasonLion said:
It is common to add CYA first thing in the spring when openning the pool. Half the time there will be lots of algae and no CYA. Fighting the algae requires backwashing frequently, so the CYA can't go in the filter. By the time everything is back to normal and frequent backwashing is no longer required there is rarely any need for more CYA.

The other thing that happens is that people don't expect to need to backwash so they add CYA to the filter. Then two days later there is some sudden reason to backwash and the CYA is forgotten about, so the half or so still left in the filter goes down the drain.

It ends up being simpler to always use a sock, instead of trying to remember that you shouldn't backwash.
Good point. Living in Houston, pools are not closed for the winter, so I forget sometimes that most (or many) people do close their pools.
 

momof2grlz

LifeTime Supporter
Backglass said:
Interesting method but CYA is Acid after all...I would think that a pile of acid would potentially weaken the netting. I just hung my sock on a string by the return.
Hadn't thought of that, but since CYA is added rarely, I'm not too worried about ruining the net. Our pool is screened so I don't have much use for it as a leaf net anyway. At least this way, it's being used for something. :wink: