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Thread: new iopening after fall conversion

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    new iopening after fall conversion

    I converted from Baqucil last fall just before closing my pool. (4' X 24' Round AG, Pentair, Sand) I did a quick test of my water recently to see where I stand before pulling the cover off. My Ph is 7.2 and TA is about 170. My chlorine level understandably is 0 and my CYA level is also 0. The pool calculator is telling me I need about 3.0 lbs of CYA. My questions are: Should I try to bring the CYA level up by dissolving 3 pounds of CYA over a week or should I prolong this, say a pound a week for three weeks, and bring my chlorine level up comesurately or wait until the CYA level is where it needs to be and then attack the chlorine ?
    18,000 Gallons plaster, in ground. Pentair quad cartridge filter system charged w/DE. Built in the early 70's. Location: Bakersfield California. Summer temps from early May to late September, up into the 100'sF. Very low shade over pool, not until LATE evening. Palm tree drops pods from neighbors yard.

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    crookm11's Avatar
    Join Date
    Jun 2010
    Copperas Cove, Texas

    Re: new iopening after fall conversion

    Welcome to TFP!

    I would go ahead and start adding chlorine to the pool and keep the level based off of your current CYA level. You can change the chlorine level as your CYA level changes. CYA is easy to add but very hard to remove (normaly requires water replacement) so add the CYA in steps, not all at once.

    Mark Crook
    13,500 Gallon 24' x 52" Intex Ultra Frame
    Intex Sand Filter and Pump, Intex SWG (All hard PVC plumbed)
    TFTestKit-100---Pool School---The Pool Calculator
    Location: Copperas Cove, Texas --- My Pool Build---Useful Links for Intex Pool Owners

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    Join Date
    May 2011
    lebanon tn

    Re: new iopening after fall conversion

    I would add the CYA, probably 1/2 of the dose, and add the proper Cl assuming the CYA is there. after about a week, you can retest the CYA and work it up form there; it takes awhile to show on the test for some reason, but it bonds the Cl almost immediately, I think and will keep you from losing as much Cl.
    Don't wait to add Cl, a Cl free pool will lead to problems quickly

    Like Crook said...
    24ft x 52in AGP 18000 gal
    sand filter, 200#,1.5 hp single speed pump
    Wood deck (still in progress...)

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: new iopening after fall conversion

    How did you get the test numbers?

    You need to add chlorine in there first to get to about 3ppm. Then add the CYA all at once in a sock. let it dissolve and then consider it in there and raise your FC as if the CYA were 30. We'll work on the rest after you post back.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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