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Thread: filter eating itself

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    filter eating itself

    i have a sand filter
    ive been noticing some sand accumulating on the bottom of my pool

    i havent beeen using the pool much, havent been in in a month
    so its not someone bringing it in with them
    ill vacume it up and it will be right back there the next day after the pump has been on

    ive had the house for 2 years, pool has been running for 3-4 months say

    i dont know how old the pool is or how long the filter has had its current sand

    should i change out the filter sand?
    should i not worry about it?
    should i change it out first thing in the spring after i open the pool, as its getting close to closing now?
    11,000 gal inground fiberglass pool
    Aquarite SWG system

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    Mod Squad JohnT's Avatar
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    Re: filter eating itself

    I don't think changing the sand is going to do much for you. You probably have a bad multiport gasket or a cracked lateral or damaged riser in the filter. Could also be an oversized pump, but probably wouldn't have just started if that was the case.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: filter eating itself

    Have you scooped any of it up and held it in your hand to confirm it's sand and not dead algae?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: filter eating itself

    i started to have an algea problem, bleech stopped that, the dead algea i was getting from that was black, this is a very light tan color much like sand

    i will jump in and grab some and see if i can tell the differance
    11,000 gal inground fiberglass pool
    Aquarite SWG system

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    Re: filter eating itself

    i will jump in and grab some and see if i can tell the differance
    sand will, of course be very gritty and fairly easy to get off the bottom. The algae will be slippery and slimey and you will not really be able to pick it up between your thumb and finger.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: filter eating itself

    well some landed on one of the steps
    went to pick it up and could not
    slipped right out
    looked greenish too

    i increased run time and increased swg output
    11,000 gal inground fiberglass pool
    Aquarite SWG system

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    linen's Avatar
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    Re: filter eating itself

    Quote Originally Posted by *ryan
    well some landed on one of the steps
    went to pick it up and could not
    slipped right out
    looked greenish too
    Sounds like algae. To be sure raise you FC level up to shock level and do an OCLT (pool-school/overnight_fc_test). This needs to be done with your swg off.

    Quote Originally Posted by *ryan
    increased run time and increased swg output
    If you have algae, you will need another source for chlorine (bleach/liquid chlorine) and I would just turn off the swg until done with the shocking process (see my sig).
    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: filter eating itself

    If you ever do start to shoot sand out your return line it will look noticeably different. You will have a straight line streak of sand that only extends a few feet from the return. Sand is so heavy that is just lays in a pile. You wont see it dispersed through the whole pool in all the crevasses etc.
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

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