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Thread: Sand filter trouble

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    Sand filter trouble

    Hi Everyone,
    I have a Hayward sand filter and I was having problems with the green algae pumping back in the pool when I vacuum. I changed the sand 250# and checked the lateral lines and all piping. I still have the same problem. The only way I can clean my pool is use flock and vac. to waste. Any ideas?
    Thanks
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

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    Re: Sand filter trouble

    Hi, Paul,

    Welcome to the forum.

    If you have green algae, you need chlorine in your pool. No filter will filter green algae from your pool. Your sand filter may have some issues or not but it will never get rid of algae....not will any other type filter.

    There are several good articles in Pool School to get you started. Particularly the ABC's of Pool Water Chemistry will explain the importance of chlorine. Post bakc with lots of questions. You'll find all the help you need to get your pool sparkling.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Sand filter trouble

    Thanks Dave. When the algae is dead will the filter not remove it or is that why it is green its not dead? I am going to pool school now.
    Thanks Again
    Paul
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

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    Re: Sand filter trouble

    Paul, when algae is alive in your pool, it is a living, reproducing organism. It simply continues to multiple in your pool, regardless of how much you filter.

    When you kill the algae dead (with chlorine).....all of it....your pool will not look green but usually grey. Now, all that's left is the "carcasses", these are filtered out by your filter (and I'm sure decompose quickly, too).

    Adequate chlorine levels is the key to never let algae get started but once it does, the high doses of chlorine (shocking) is what needs to be done to cure it.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Sand filter trouble

    Thanks Dave. By the way we lived in Whitsett outside of Greensboro for 35 years. We now live in Costa Rica.
    Thanks for your help.
    Paul
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

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    frustratedpoolmom's Avatar
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    Re: Sand filter trouble

    Costa Rica... How exotic!
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: Sand filter trouble

    Costa Rica... How exotic!
    Shoot, I was about to post the same thing about Whitsett!!
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Sand filter trouble

    How big is your pump.
    I had this problem as well, when installed a smaller pump i had a TFP pool

    happy swims
    Frank
    Hello all from the land of smiles. Thailand. 5mx9mx1.5 63000L 16300 gall, pebbletex,
    pentair 1hp whisperflow, tagelus TA60 SF, swg monarch esc24 {a bit small for the tropics} 3 returns, 1 skimmer, 2 astral 100watt lights. Planned and built by me
    an AUSSIE expat living thailand for 18 years.

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    Re: Sand filter trouble

    Live "green" algae usually makes it right back to the pool if you try to vac it up while it's alive, dead algae (grey powery stuff) will get caught but will clog the filter quickly, vac live algae on waste and even large amounts of dead I would vac on waste as well.
    -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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    Re: Sand filter trouble

    Thanks Kevin.
    The filter is 1hp. Will get the algea killed and get to work cleaning.
    Paul
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

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    Re: Sand filter trouble

    Quote Originally Posted by PaulJohnston
    Thanks Kevin.
    The filter is 1hp. Will get the algea killed and get to work cleaning.
    Paul
    well technically your pump&motor is 1HP (not your filter ), with 250lbs sand filter I don't think you are over sized as someone mentioned before happened to them.
    -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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    Re: Sand filter trouble

    Paul,

    Do not vacuum to waste to get the algae out of your pool. it will not work.

    1. Kill the lagae with constant high levels of clorox.

    2. When you've got stuff on the bottom of the pool, vac to waste or into your filter depending on if you can stand the water loss or not.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  13. Back To Top    #13

    Re: Sand filter trouble

    Thanks Dave,
    I put 5 lbs of chlorine in last night and it did nothing. PH 7.6. 25,000 gallons. Is it possible to get bad chlorine. I ask because here in Costa Rica there is no regulation or enforcement of consumer products. You have to be careful about everything. Let the buyer beware was never truer. Can I test the stuff. It says 90% but may be 30% who knows.
    Thanks
    Paul
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

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    frustratedpoolmom's Avatar
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    Re: Sand filter trouble

    So it's powder? What's the active ingredient?

    Can you get Clorox bleach there? That would be best.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  15. Back To Top    #15

    Re: Sand filter trouble

    Yes I can get Clorox here. How much should I add? 25,000 gallons water.
    Paul
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

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    frankthailand's Avatar
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    Re: Sand filter trouble

    hello Paul
    If you have been using trichlor, [Trichloroisocyanuric acid] and you used it for a long time. Then you probably have too much CYA in the pool. This will make it next to impossible to clear up your pool.

    The best thing you could do is get a test kit which tests cya and ch cl ph. etc and tell us the results.

    I got a TF test kit, smartest thing i did, because then you know what your pool is doing.

    And read pool school twice

    Happy swims
    Frank
    http://www.tftestkits.net/
    Hello all from the land of smiles. Thailand. 5mx9mx1.5 63000L 16300 gall, pebbletex,
    pentair 1hp whisperflow, tagelus TA60 SF, swg monarch esc24 {a bit small for the tropics} 3 returns, 1 skimmer, 2 astral 100watt lights. Planned and built by me
    an AUSSIE expat living thailand for 18 years.

  17. Back To Top    #17
    frustratedpoolmom's Avatar
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    Re: Sand filter trouble

    Quote Originally Posted by PaulJohnston
    Yes I can get Clorox here. How much should I add? 25,000 gallons water.
    Paul
    Without knowing your CYA level, we can only guess. 6 small jugs of Clorox will raise your FC up to a shock level of 10, which is as high as I would suggest until you confirm your CYA level. If your CYA level is higher, so is the shock level - refer to the CYA chart.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  18. Back To Top    #18
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    Re: Sand filter trouble

    Hello again

    Paul you might find these links usefull.

    Frank

    what-we-need-to-know-to-answer-your-questions-t10341.html?hilit=to much cyanuric

    cya-help-t14331.html?hilit=to much cyanuric
    Hello all from the land of smiles. Thailand. 5mx9mx1.5 63000L 16300 gall, pebbletex,
    pentair 1hp whisperflow, tagelus TA60 SF, swg monarch esc24 {a bit small for the tropics} 3 returns, 1 skimmer, 2 astral 100watt lights. Planned and built by me
    an AUSSIE expat living thailand for 18 years.

  19. Back To Top    #19

    Re: Sand filter trouble

    Thanks Frank.
    The chlorine I get here is suppose to be TRICHLOR 90%.
    Costa Rica
    38'X26'
    1hp Sta-Rite
    300# Aquaworks filter
    Salt Water Generator

  20. Back To Top    #20
    frankthailand's Avatar
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    Re: Sand filter trouble

    Paul

    How long have you been using trichlor exp 5lbs will raise cya by 13. If you have been using it for awhile your cya will be too high.

    Basically without knowing your test numbers we can't really help.

    IMHO i reckon you have CYA problem and your going to have lower it.

    http://www.poolcalculator.com/
    Cheers Frank
    Hello all from the land of smiles. Thailand. 5mx9mx1.5 63000L 16300 gall, pebbletex,
    pentair 1hp whisperflow, tagelus TA60 SF, swg monarch esc24 {a bit small for the tropics} 3 returns, 1 skimmer, 2 astral 100watt lights. Planned and built by me
    an AUSSIE expat living thailand for 18 years.

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