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Thread: Strange growths on surface as of late

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    Join Date
    May 2016
    Location
    Fort Worth
    Posts
    10

    Strange growths on surface as of late

    I've been having some strange growths along the sides and floor of my pool, which I'm assuming to be gunite.

    More recently: An algae-like substance, that takes a lot more work to scrub off than the usual buildup during SLAMing, which I just completed a few days ago. It's also more brown. I rubbed it with a lime, which had some effect but didn't take it all off. I wouldn't say the results were much more of an improvement over some hard brushing. If I could correlate some event to it, maybe it's after I added a phosphate inhibitor (phos-free type of Leslie's chemical) but that's all I can think of. The phos-free was pretty old, and had sat outside, though not in direct sunlight.

    Overall for the past year or year and a half: Small dots (but all over the pool) of these very, very hard deposits of what look to be calcium (silicate?). They are very hard to remove. Is this going to require a scaling chemical solution or am I going to need to chisel them off? It wasn't always like this in my pool. Not sure what is changing in the chemistry. We did have a massive drought a couple years ago and then a massive few months of rain, enough to fill up all the lakes again. Possible issue there?

    I will note that I did drain the pool a year ago and left it empty for a bit longer than I'd liked to. It did put some emphasized cracking on some cracks that had already developed. Those cracked locations began to develop a white substance that is similar in color to these hard deposits. Is this indicative of a pretty serious underlying issue? My pool is not losing water.

    I am in D/FW, TX. I am fairly new to these pool forums, so forgive me omitting any pertinent information or any ignorance.

    Pool Test:
    TDS: 500
    Copper/Iron: untested
    pH: 7.8
    Alk: 80
    Free/Total Chlorine: 0/0 (just cleared up the pool and added phos-free, which requires low chlorine to my understanding)
    CH: 220
    CYA: 0
    Phosphate: 0


    Thanks,

    - - - Updated - - -

    I will post an image of the cracks once I figure out how to make it allow further attachments.
    Attached Images Attached Images
    Last edited by dest2ko; 04-16-2017 at 11:01 PM. Reason: Typos

  2. Back To Top    #2

    Join Date
    Dec 2016
    Location
    Arlington, Texas
    Posts
    291

    Re: Strange growths on surface as of late

    Howdy Richard. Looks like we need to get you away from Leslie's. They just want your money. You need to get your own quality test kit. You need either the Taylor k2006 or the tf100. With you having an inline chlorinator, I bet your CYA is not 0 unless you haven't been using tabs.
    310 gallon Tiger River Sumatran Spa, covered, standalone, fiberglass, Bleach
    11,000 gallon in-ground plaster pool, Hayward SmartFilter 550 (cartridge), CompuPool(Hayward) T-15 SWG, Hayward Super II pump
    Taylor Test Kit K-2006C, K-1766, SampleSizer, SpeedStir, Polaris P825

  3. Back To Top    #3

    Join Date
    May 2016
    Location
    Fort Worth
    Posts
    10

    Re: Strange growths on surface as of late

    The chlorinator has not been refilled yet. Though i do smell that lovely heavy chlorine smell when I turn the system on, so maybe there's a little.

    I will check out those kits, thanks.
    Richard
    20k IG Plaster, Pentair 1.5HP 2-speed (355377S), Hayward Pro-Grid DE Filter (60 sq.ft), Polaris 3/4HP PB4-60 Booster, Polaris cleaner, Centurion 1.5HP water effects
    Pentair MiniMax 400 (Spa), inline chlorinator, Vision VS? Sanitizing system
    Constructed 1992, Leslie's water kits, Cascade waterfall, tanning shelf w/ fountain pipe

  4. Back To Top    #4

    Join Date
    May 2016
    Location
    Fort Worth
    Posts
    10

    Re: Strange growths on surface as of late

    Any understanding of what might be happening here?

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    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
    Posts
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    Re: Strange growths on surface as of late

    Quote Originally Posted by dest2ko View Post
    Any understanding of what might be happening here?
    Yes, your pool is chronically under chlorinated. Getting it cleaned up and crystal clear is reasonably simple but will take some physical effort and, primarily, a mental effort to tune in to the TFP way.

    My suggestion is to Please read "The "ABC's of Pool Water Chemistry" up in Pool School. You'll have questions after that and we'll answer them but you need to under stand that that green algae is a lack of chlorine.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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