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Thread: Dead algae and cloudy water

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    Dead algae and cloudy water

    Hi,
    I opened my pool yesterday and the water was clear but loaded with dead algae. I skimmed out a lot of it, brushed the walls and then shocked with liquid chlorine. Ran the filter for 10 hours. Woke up this morning and the water is completely cloudy, can see maybe a foot down. I tested water (only have ph and chlorine kit). The chlorine was in the normal range but ph very very high. I ran filter 10 more hours, changed and cleaned cartridges many times but I am still skimming up algae and seems cloudier .
    I have 2 questions, should I shock again and what do I do abut the high PH level? Also, I still haven't vacuumed because I thought it would just clog it up, should I vacuum anyway?
    Any suggestions/help would be greatly appreciated. I never had any problems opening pool before.
    Teresa
    18 by 52 round AG, 8400 gall
    Hayward Cartridge filter C410 easy clear

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    Azgirl71's Avatar
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    Re: Dead algae and cloudy water

    Sorry your pool opening did not go as planned. The first thing I recommend is investing in a recommended test kit such as the TF 100 or Taylor K 2006. Sounds like you are going to need to perform a SLAM, but cannot do it without a recommended test kit. You get a little more bang for your buck with the TF 100.

    That does your PH test say your PH is?

    - - - Updated - - -

    We need to know
    FC
    CC
    PH
    TA
    CH
    CYA
    To best guide you. Have you read the ABC'sof pool water chemistry in Pool School?
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Mod Squad pooldv's Avatar
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    Re: Dead algae and cloudy water

    Welcome to TFP!

    Here are some intro Pool School articles
    TFPC for Beginners
    ABC's of Pool Water Chemistry

    Here are the Recommended Levels for your pool.
    Here are the Recommended Pool Chemicals
    Use PoolMath to figure out how much to add.
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Dead algae and cloudy water

    I'll look into the kit but in the meantime is there any suggestions so when I have my BBQ this weekend the kids can use it
    18 by 52 round AG, 8400 gall
    Hayward Cartridge filter C410 easy clear

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    Mod Squad pooldv's Avatar
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    Re: Dead algae and cloudy water

    Pool store tests and strip tests are very inaccurate and recommendations based on those test results is also inaccurate and can lead to more problems.

    It is safe to swim when your PH is between 7.2 and 7.8, your chlorine is below shock level for your CYA level on the Chlorine CYA Chart and the water is clear.

    The fastest way to clear up your pool is to follow this process, SLAMing Your Pool.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Swampwoman's Avatar
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    Re: Dead algae and cloudy water

    Welcome! I just wanted to add that the other reason you need a proper test kit is because the TFT and Taylor 2006 are the only ones that will read you FC at the high shock/Slam leaves.

    If you order from TFTkits, you could ask that it be overnighted, and you might have a chance of getting clear by the weekend, depending on your parameters.

    We can't even safely give you a ballpark shock/slam level to aim for in the interim because we don't know your CYA level, and that "defines" what your accurate shock/Slam level is. We dont want you to bleach out your liner by just blindly adding chlorine to slam levels.

    I realize hindsight is 20/20, but next year if you open a little earlier, you not only have more time to get the pool into shape, you also could open clean and clear and not even have to shock/slam. So you'll more than get your money's wrth to get te kit now and follow the TFP methods!

    Cheers to clear
    In ground extended Grecian, 22,000 gal, Hayward 220t sand filter, vinyl liner, dolphin m4 supreme.
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    Helpful Links:
    GET A TEST KIT Chlorine/CYA Chart How to SLAM About Metals & Stains

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    Re: Dead algae and cloudy water

    Hi Teresa, I would definitely add some Aquaperl filter media to your cartridge filter via the skimmer to increase the effectiveness of your cartridge filter. Most dead algae is so tiny that it scoots right past those cartridge filters and doesn't really get removed from the pool water first trip through the filter. Adding a filter media like Aquaperl or Fiberclear coats the cartridges harmlessly and will catch that dead algae. Be sure not to use Diatomaceous Earth as it will ruin your cartridges.

    Best of luck,

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    Mod Squad jblizzle's Avatar
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    Re: Dead algae and cloudy water

    Adding some filter aid is all well and good, but is not fixing the root of the problem which is not maintaining enough chlorine in the pool.

    If you want to take control of your pool, you MUST invest in one of the Recommended Test Kits, just like was recommended to you last May when you were here and in the first responses you just got.

    It might be too late for you to have a sparkling pool by this coming weekend by following our methods. Although I am sure the pool store would be more than happy to sell you magic in a bottle that may or more likely may not work.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: Dead algae and cloudy water

    Your chemistry is not correct. Being able to test your water with precision and then knowing what to do to get it cleaned up is the first step. Without those test results, no one can tell you, with certainty, where to begin.

    I would not suggest a filter "helper" of ANY brand. Sand, DE, and Cartridge filters are all capable of giving you a perfectly clear pool. Before that can happen, though, your chemistry has to be correct.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Dead algae and cloudy water

    Thanks for the help/suggestions!!
    18 by 52 round AG, 8400 gall
    Hayward Cartridge filter C410 easy clear

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    tcat's Avatar
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    Re: Dead algae and cloudy water

    I had opened/slammed a couple weeks ago, got water to clear (wasn't bad and not sure if I had algae). I had the solar cover on most of the time since. Pulled it off Sunday, clear water... until I brushed. Immediately turned to light green tint. Kept pump running on high (so far 48 hrs), and it's much clearer. Jets were down to a trickle. My filter went from 20 to 25psi in 2 days; backwashed, back to 20. Getting clearer now. My CC has always been below .5 and FC always steady 4.5-5.5. So pretty sure it's all dead algae. Just keep your filter fairly clean and keep the pump running (and make sure you have chemistry right). My CYA is 35-40. Turned pump to low, but still plan on running it 24/7 for a while.
    IG pebble, 15,000 gallon
    48 PentAir DE Filter with backwash valve
    PentAir Whisperflo pump with 1hp 2-speed motor
    Aquabot 4WD, Poolskim
    Intermatic Dual Timeclock with freezeguard
    DIY chlorine feed
    BBB

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    Re: Dead algae and cloudy water

    Quote Originally Posted by duraleigh View Post
    Your chemistry is not correct. Being able to test your water with precision and then knowing what to do to get it cleaned up is the first step. Without those test results, no one can tell you, with certainty, where to begin.

    I would not suggest a filter "helper" of ANY brand. Sand, DE, and Cartridge filters are all capable of giving you a perfectly clear pool. Before that can happen, though, your chemistry has to be correct.
    While chemistry is important, it is a fact that all three of those filter types will provide different levels of clarity. The original poster specified that the algae was already dead, so taking the post at face value they can clear up the pool by increasing the effectiveness of the cartridge filter (which we still have no idea what size/quality/condition of the cartridges.) All that to say, dead algae will "blow by" a freshly cleaned standard name brand cartridge filter, (even manufacturers state this) although as the filter starts to clog it will filter better. This of course takes extra run time. With adding of perlite you can cut the filtration time down considerably, expecially if you need to do multiple filter cleans to remove all the dead algae.

    Respectfully,

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