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Thread: Should I bother adding CYA?

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    Join Date
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    Question Should I bother adding CYA?

    I live in Mid-Western Ontario, and today it is a balmy 13 C or 55 F. We finally got the pool up and running about 3 weeks ago. My CYA reading is around 35 ppm. I used the 2 sock method to dissolve 1KG of the dry CYA. It seemed to take forever to dissolve. I know with a SWG I should have a CYA level of 70ppm, although I am not sure why so high, but that's what you guys are telling us to do here. My question is, being that it is so late in the season, is there any reason to raise this CYA level when we will be closing the pool in a month or so?

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    Mod Squad tim5055's Avatar
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    Re: Should I bother adding CYA?

    At 55F you are below the 60F that algae needs to grow. Writings here say to not close a pool until the water temperature is consistently below 60F.

    I would guess no, but I'll yield to more experienced folks.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Mod Squad jblizzle's Avatar
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    Re: Should I bother adding CYA?

    Having the higher CYA level allows the SWG to not work as hard and thus should extend the life of the cell. Way up there, maybe the sun and lack of heat is not as hard for the SWG to keep up, so a lower CYA may work fine. Try it and see what happens.

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    Re: Should I bother adding CYA?

    Sorry Jason. I thought I had put my pool details in awhile ago. I guess I put them in the wrong place. I will try again.

    I am counting on the weather warming up again soon. It was hot a few days ago. Not sure where today's weather came from. I did hear a polar vortex is headed for us in September. Not looking forward to that.

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    Mod Squad jblizzle's Avatar
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    Re: Should I bother adding CYA?

    Check that you added the info and checked the box to make the signature visible.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: Should I bother adding CYA?

    Jason,
    I did add the information to my signature. Is it showing up now?

    - - - Updated - - -

    Never mind Jason. I can see it myself now. Thanks!
    Intex 24'x12'x52" Ultra Frame (2014), 8400 gallons (31800 litres), Intex sand filter and pump, Intex SWG, AquaBot Pura4xi, solar blanket. Proud owner of Hydropool Serenity 5 Hot Tub! Taylor K-2006 Test Kit.

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