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Thread: Why the sock?

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    Why the sock?

    I'm wondering the purpose of using a sock to add CYA.

    I used a sock the first time I added CYA.
    I put the sock in the skimmer and it was empty in a couple of days.

    I added another two pounds a couple of months ago and poured the CYA directly in the skimmer- no problems.

    I read somewhere that dissolving the granules through the sock is supposed to prevent clogging the plumbing.

    That never made sense to me. The CYA will not harden when trapped in the sock. It remains a powder as it dissolves.
    Why would it harden in the pipes?

    If I'm overlooking something, I'll stand corrected.

    Thanks
    10,000 gal / Plaster / Cartridge Filter / 1 1/2 HP pump motor/ TF-100 test kit.

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    Mod Squad jblizzle's Avatar
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    Re: Why the sock?

    The main reason for the sock is so that you know when it is dissolved. Also, if you let it into the filter, then you do not know when it is safe to clean the filter without losing some of the undissolved CYA.

    And we have seen a few supposed cases of the skimmer getting clogged by pouring it in, likely too fast.
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    steveg_nh's Avatar
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    Re: Why the sock?

    I've found that it dissolves much faster when hanging in front of a return in a sock. About 2-4 hrs for 2-3 pounds vs a couple of days in the skimmer basket. I don't have to run the pump as long non stop when using the sock in front of the return.
    24'x40' 25k gal Imperial Mountain Pond IGP, full 28 mil VynAll Ocean Breakers liner. All Hayward system: 140k BTU HeatPro heat pump, 3/4HP single speed TriStar 2" Pump, DE6020 filter, AquaPlus Automation/Salt Chlorination, remote controls, ColorLogic 4.0 lighting. Polaris 280 w/PB4-60 BP. TF100 & K1766 test kits. Rinox Palazzo pavers and Spherik coping. Pool installed 9/2013, project completed 6/16/14.

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    JasonLion's Avatar
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    Re: Why the sock?

    Without the sock it is quite possible for the CYA to accumulate in the pump skimmer basket and either break the basket or stave the pump of water. This isn't the most likely possibility, but it does happen. The sock contains it and allows there to always be a way for the water to get around the CYA and reach the pump.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Why the sock?

    With the CYA in a sock, you can backwash any time you like without losing much CYA. That convenience alone is worth it for many folks.
    Dave S.
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    Isaac-1's Avatar
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    Re: Why the sock?

    Also CYA is acidic so you don't want to just broadcast into the pool to sit on the bottom for days while it dissolves
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    Mod Squad woodyp's Avatar
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    Re: Why the sock?

    One post the other day didn't clog the pump basket, but the impeller instead.
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    Re: Why the sock?

    Well, the sock it is, if I ever add anymore.
    Thanks for the replies.
    10,000 gal / Plaster / Cartridge Filter / 1 1/2 HP pump motor/ TF-100 test kit.

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    mickey4paws's Avatar
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    Re: Why the sock?

    I have some CYA in one of those leaf gulper fine mesh bags, tied in front of one of the returns. Hope this works ok. Just put it in this afternoon.
    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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