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Thread: Spring Startup Question

  1. Back To Top    #1

    Join Date
    Feb 2012

    Spring Startup Question

    Im going to fire up my pool this weekend. Since the water is only mid 40's I am going to obviously use bleach for a while. So, if my CYA is 80 the target FC is 6-9. However, once SWCG is active with a CYA of 80 the FC range is 4-6.

    1. Do I just let FC slowly drop prior to starting SWCG? I fear I may let it go too far inadvertently. Perhaps I leave the level as-is and then when the SWCG takes over I slowly adjust.

    2. This one baffles me, but why would SWCG need less FC than manual? If chlorine is chlorine, why would it make a difference?
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Spring Startup Question

    1. Yes just let it drift down a little. Or start the SWG at the higher levels and adjust it until you are in range

    2. The recommended FC levels for SWG are a absolute minimum for a couple reasons. 1. There is not a human in the loop to forget to add chlorine for a day or two so there is wiggle room in the non-SWG numbers. And 2. within the SWG cell itself is like a super-chlorination chamber so that does a better job at killing stuff as water passes through.
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