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Thread: Not sure where to put this question

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    Not sure where to put this question

    Soooo.... I opened the pool may 1 but like an idiot I turned off the pump because we got rain here in NY for like 3 weeks straight. Anyway, after many shocks later, a power vac, and multiple backwashings, the pool is just about crystal. Chem is as follows, fc 2.5, ph 7.4, alk, 70, salt 3000, cya 50, and ch 100 and temp was 86 (love that heater). I believe my numbers are good.
    My issue is that my pressure is about 4.5 at 1500 rpm. At that rpm reading my heater flow is fine and the swg is working. However when the pressure rises to 8 the heater gives the low flo reading and the swg still works, however if I drop my rpm to 1100 the swg gives the no purifying light. At this point I backwash and everything is back to normal. The last 2 years my rpms have been 1100 and the swg is always working, however the heater always needs that 1500.
    Since I had so much algae in the pool, can the filter still be getting that blocked with dead algae even though my water is basically clear? I don't remember ever having to backwash the pool during the season because the pressure was always 0 at 1100 rpm, and the pool was always clear and chems perfect.
    I know, I went on and on and on.
    16X32 Inground, vinyl liner with center steps. Autopilot salt system, Hayward DE36, Pentair VS VRS, with 2 returns, 2 skimmers, and dual main drains. Aquacal 120.

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    linen's Avatar
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    Re: Not sure where to put this question

    Quote Originally Posted by reklak
    Since I had so much algae in the pool, can the filter still be getting that blocked with dead algae even though my water is basically clear?
    Yes it could be... I would bring your pool back up to your shock level (16 ppm FC) and do an OCLT if you haven't yet.

    What is your CC?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Not sure where to put this question

    Don't forget to turn off the swg when doing the oclt.
    POOL: Intex ultra new in 2014 (32 x 16 x 52) (seasonal; on concrete pad covered with 1.5" extruded or whatever foam insulation sheets - ugly, but comfy); added a through-wall skimmer; I add salt for feel. EQUIPMENT: Pentair SuperFlo pump (1HP, 2SPD); Pentair cartridge filter (200 sq. ft); Pentair MasterTemp natural gas heater (400,000 btu) Climate/Location: Eastern Nebraska

  4. Back To Top    #4

    Re: Not sure where to put this question

    I will have to wait until tomorrow night and get some liquid shock. Let you know on Monday.
    16X32 Inground, vinyl liner with center steps. Autopilot salt system, Hayward DE36, Pentair VS VRS, with 2 returns, 2 skimmers, and dual main drains. Aquacal 120.

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