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Thread: Amazing how little filtration has to do with clearing algae

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    Mod Squad JohnT's Avatar
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    Amazing how little filtration has to do with clearing algae

    My pump quit last Wednesday morning, and thanks to poolcenter.com's speedy 2 full business day order processing, I didn't get a new one until Tuesday with 2nd day air shipping. Also got a new filter from Amazon.

    Finally got everything replumbed last night. Needless to say, the pool was a swamp, with the steps covered with green slime and visibility of a foot or so. I didn't have time to put sand in the filter, so I turned everything on running on recirculate so I could chlorinate. Raised the pool to shock level about 7pm, ran to a ballgame, and when I got home at 9 I was down to 4ppm. Boosted it back up, came inside and watched TV until 10:30. Down to 7ppm, boosted it back up and back to the TV. At 12:30 I went out for one last check, boosted the chlorine back up from 6ppm and went to bed.

    At 7 this morning, the chlorine was at 6ppm, the slime was completely gone from the steps and I could see the pool bottom out past the shallow end break. No green at all, just the cloudy blue.

    No filtration, no brushing, no algaecide and no sweeping, just steady shock-level chlorination for 12 hours.
    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: Amazing how little filtration has to do with clearing algae

    That's interesting John. Of course, it is still cloudy though so it's safe to say that you will still need the filter to clear that dead algae up. At least you are holding your FC though and that's a good thing considering what you had going before.

    When is your new filter arriving and which one did you get?
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
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    Mod Squad JohnT's Avatar
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    Re: Amazing how little filtration has to do with clearing algae

    Quote Originally Posted by 257WbyMag
    That's interesting John. Of course, it is still cloudy though so it's safe to say that you will still need the filter to clear that dead algae up. At least you are holding your FC though and that's a good thing considering what you had going before.

    When is your new filter arriving and which one did you get?

    I got a new Hayward S244T. Ordered it from Amazon about 15 minutes after I ordered the pump. Filter arrived on Friday, but I had to wait on the pump. The filter was responsible for part of the delay, since the Hayward multiport has both the inlet and outlet on the same side, and very close together. With my solar, I had to replumb a good bit to make it work since the Pentair had the inlet and outlet 90 degrees apart.

    I'm very impressed that in only 12 hours the green was completely gone.
    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: Amazing how little filtration has to do with clearing algae

    So what you're really saying, is that you don't need that new filter. I'll take it off your hands, and I'll even pay for shipping!



    Seriously though, glad you didn't have a really big mess to clean up!
    John

    24' round Vogue AGP 12,000 gal. Flotec AT251001-01 1HP pump, Hayward S310T2 sand filter, Aquarite SWG T-15
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    Kes's Avatar
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    Re: Amazing how little filtration has to do with clearing algae

    John, I'm curious why, when waiting for the new kit, you didn't add your usual chlorine dose directly and stir it in with a brush or similar.

    I think that the filter, even with sand, doesn't remove much green algae - mine doesn't anyway - so it doesn't have much effect on clearing a green pool. Possibly you could chlorinate and set the multiport to recirculate to get the same effect (although I can't think of any reason why you would want to do that).
    11,000 Imp galls inground hopper 15' x 35', Delifol liner (vinyl), sand filter, Abrisud Classic cover, Palintest 315C test kit

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    Mod Squad JohnT's Avatar
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    Re: Amazing how little filtration has to do with clearing algae

    I had had filter problems all season, and I hadn't been able to vacuum. The pool was actually dirtier in mid-May than it was when I opened. I was using pucks to chlorinate since I had low CYA, and I had a very large chlorine demand due to sunlight and organics in the pool. I kept it chlorinated by manual mixing for a short while, but it soon became apparent that it was going to be easier to clean it up afterwards since I had to go to 8 or 10ppm every morning in order to have any chlorine left when I got home 10hrs later. I could deal with it with a pump, but once the pump quit it was too much work.
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    Lershac's Avatar
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    Re: Amazing how little filtration has to do with clearing algae

    Algae are amazing in how they can muck up perfectly good water amazingly fast. I mean where do they get the raw materials to make their bodies out of? Is there that much STUFF dissolved in water?
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

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    Re: Amazing how little filtration has to do with clearing algae

    The main elements that make up most cellular material are carbon, hydrogen, oxygen and nitrogen. There is plenty of carbon from carbonates in the water (including carbon dioxide which is what plants like especially) and plenty of oxygen and hydrogen in water (as well as some dissolved oxygen) and nitrogen from nitrates (which are a by-product of oxidation of the ammonia and urea in your sweat and urine). There are also phosphates and other micronutrients in the water. Plenty for algae to use to grow, but oh so easy to prevent using chlorine.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Amazing how little filtration has to do with clearing algae

    hey John...I scored the shock at shop today...case for 11.99....since I'm unexpectedly shocking this weekend and WM was out of GV 182 oz bleach, it was a welcomed deal, not posted instore...
    Backyard pool-less, but used to be.....
    16,100 gallon, 18x38 3.5 ft deep oval AG, Vinyl, Sand, 1hp pump
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