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Thread: Science project

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    no-mas's Avatar
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    Science project

    My pool boy/yard guy/son wants to do a science fair project involving swimming pool sanitation. Any of you been down this path before, or have any thoughts/ideas to get him started?
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    Re: Science project

    What year in School?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Science project

    There has been anecdotal evidence on the forum that different colors of solar cover make a difference in FC consumption. Basically with a darker cover you lose less. This is probably because of different amounts of UV getting through. The experiment could be tuned for different degrees of sophistication in the scientist as well as available measuring equipment. The hard part would be getting a reasonable range of cover samples to try.

    In middle grades, you could chart FC and temp versus cover type/color, in a set of buckets.
    In high school, you might want to measure UV absorbtion of the different types of cover, as UV is the main source of FC loss (in a clean pool). This could be correlated against temp and FC loss as well.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
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    frustratedpoolmom's Avatar
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    Re: Science project

    What about duplicating the CYA converting into Ammonia theory?
    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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    spishex's Avatar
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    Re: Science project

    Anything involving your SWG cell would probably get some attention. He could figure out your chlorine consumption and then use that to see how long your cell would have to last for you to break even. Or he could take a look at the difference between manufacturing chlorine in the pool via salt + electrolysis vs. what it takes to manufacture mass quantities of tabs/cal-hypo/liquid off-site. Or both!

    There's also plenty of info on here about "alternative sanitizers" if he wanted to go that route.

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    no-mas's Avatar
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    Re: Science project

    Quote Originally Posted by duraleigh
    What year in School?
    He's a sophomore in hs.

    He'd like to do something with alternative sanitizers as Spishex suggested, but I certainly don't want him trying anything in OUR pool - we'd need to find people using biguanides, mineral systems etc... I wonder if it would be feasible to set up a few sample "kiddie" pools that he would attempt to maintain using several different methods - though I don't know how we would set up separate filtration for each one...
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    no-mas's Avatar
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    Re: Science project

    Thanks for the ideas, guys. Anyone have thoughts on the feasibility of maintaing a bunch of small pools using different methods for sanitation?
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    Re: Science project

    Quote Originally Posted by no-mas
    Thanks for the ideas, guys. Anyone have thoughts on the feasibility of maintaing a bunch of small pools using different methods for sanitation?
    I'll suggest that you'd need both circulation and filtration to be more pool-like. Fish ponds are sometimes filtered by homemade box filters made from a plastic storage box filled with plastic kitchen scrubbies from the dollar store. You need a pump to take water from the kiddie pool, into the box at one end, out the other where it spills over back into the pool. Intake from the pool would be well away from the spillover back into the pool.

    Or find a used HOT (Hang On Tank) Magnum fish tank filter. Local fish forums might turn up a used one for sale. I last bought one used for $20, about $40 or $50 new online. That would require the sidewall of the pool be strong enough to support it, narrow enough to hang it, and be sheltered from rain which might defeat the purpose of the experiment but maybe that could be worked around. HOT Magnums can use a micron filter, about $8 extra, which would approximate a cartridge filter or DE filter I guess.

    Not sure any of that helps, and it may be that these would just complicate the experiment too much.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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    no-mas's Avatar
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    Re: Science project

    Quote Originally Posted by anonapersona
    Not sure any of that helps, and it may be that these would just complicate the experiment too much.
    Actually - that helps an awful lot. Thanks for the ideas!
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    JasonLion's Avatar
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    Re: Science project

    You can get the smaller Intex filter/pump combo units for around $30, for example here.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    no-mas's Avatar
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    Re: Science project

    Quote Originally Posted by JasonLion
    You can get the smaller Intex filter/pump combo units for around $30, for example here.
    That's a nice find. Thanks Jason.
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    launboy's Avatar
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    Re: Science project

    If you're going to buy, I'd do it now! They're on sale for $13.99!!!!!

    Can't beat that.

    Good luck with the project,
    Adam
    18' x 42" Intex Easyset Pool, with 16' x 52" deep end in the middle. Approx. 5500 Gal.
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    Goin' on 9 summers...NOBODY thought it would last this long.
    Buried Portable Spa sharing pumps and water with pool (Almost complete project)

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