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Thread: Cloudy Water after adding algecide

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    Cloudy Water after adding algecide

    I've had my pool since 2008 with no problems until this year.

    My pool had a pinhole leak so the cover fell in last winter as the water dropped. When I opened it this spring, I cleaned it out, filled it the rest of the way (with well water), added metal control, filtered and shocked it. The water was clear and just a little cloudy when I cleaned my deck with Amonium Chloride and got a little over-spray in the pool. The pool turned greenish brown (like adding chlorine to metal) so I dropped the chlorine and added more metal control and the water cleared up but left a stain from the winter water level down causing the pool to look like it had a greenish/brownish tinge though the water was clear.

    I visited the pool store on May 29 and got the following results:
    CYA: 13
    TCH: .3
    FC: 0
    PH: 8
    TA: 118
    Iron: 0.1
    Algae: None

    They had me do the following:
    Change the sand in my filter
    Use Bacquacil Sparkle Up in the filter, run for 24 hours and backwash
    add 3 lbs Stabilizer
    Shock the pool

    I then found your forum and was reading about the Ascorbic Acid treatment for stains. I tested my stain with a grapefruit since I didn't have vitamin C and with a little rubbing with the grapefruit, it significantly lightened the stain. In preparing for the Ascorbic Acid, I let the chlorine run low, dropped the PH to 7.2 and added Polyquat 60 (about 1/2 quart). As soon as I put in the Polyquat 60, the water turned a cloudy gray color (I can only see down about 18 inches).

    I attached a picture. I can't tell if the stain in the pool is affecting color or if this is the color of the water. Water in the skimmer doesn't look greenish, just cloudy like water with just a little milk in it. [attachment=0:1i5ng9af]photo (1).JPG[/attachment:1i5ng9af]

    I did not do the Ascorbic acid yet because the water is a mess and I don't want to get too much started at once.

    I ordered a Taylor K-2006 kit and it should arrive tomorrow or the next day. After doing more research on your site, I should have gotten the TF100-XL but I'll just order some refills. I will post better test results as soon as I get my kit but any ideas on what I may be getting ready to battle?

    Thanks.
    Attached Images Attached Images
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

  2. Back To Top    #2
    JasonLion's Avatar
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    Re: Cloudy Water after adding algecide

    It is time to stop going to that pool store. Hardly anything they had you do was a good idea.

    You need to get the water completely cleared up and all of your levels stable before you attempt an AA treatment.

    Polyquat is also a clarifier, even though it's primary role is as an algaecide. It looks like there was probably enough tiny debris in the pool for it to coagulate it into larger clumps which caused the clouding. If everything is going well the filter should clean that up fairly quickly.

    I suggest you maintain slightly higher than normal FC levels, run the filter 24/7 to clear up the water, and get a full set of test results when your new test kit arrives. Then we can see from the test results what, if anything, needs to be adjusted before doing the AA treatment.
    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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    Re: Cloudy Water after adding algecide

    Thanks for the quick reply. It has looked like this for about 36 hours. I'll keep filtering, backwashing, and provide the test results when the kit shows up. Thanks again.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Re: Cloudy Water after adding algecide

    I got the testkit and did my tests this morning. Here are the results:

    FC: 2.5
    CC: 0.5 (I was testing in .5 increments not .2)
    pH: 7.2
    TA: 100
    CH: 40
    CYA: 30

    As of yesterday, after filtering/backwashing/filtering/backwashing... for the last few days, I can see the bottom of my pool though the water is still a bit cloudy and the color is about the same as the picture above (could be the stains in the bottom and bottom half of the wall giving the water a colored look).

    For anyone reading this who is testing with strips or the standard color match kit from Walmart or the free one the pool place probably included in the starter kit with your pool, I highly recommend one of the kits on this site. I wish I had found it sooner.

    Thanks in advance for any advice.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Re: Cloudy Water after adding algecide

    Based on your results (good kits are great, huh?), I would shock the pool. Start it by getting your FC up to around 12-14 ppm. Read "How to Shock Your Pool" up in Pool School, follow those directions carefully (remember, it is a process that may take a few days) and I think your pool will turn crystal clear.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Cloudy Water after adding algecide

    Yes, being able to easily and accurately test water rocks. I've been missing out for years .

    Thanks for the advice. The good news is the weekend is here so the 2 day process won't be bad. The bad news is we are supposed to get a couple inches of rain between now and tomorrow at noon. I guess it will just take a little extra bleach. I'll post my results once I do the shocking.

    Thanks again.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Richard320's Avatar
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    Re: Cloudy Water after adding algecide

    Quote Originally Posted by NHDad
    Yes, being able to easily and accurately test water rocks. I've been missing out for years .

    Thanks for the advice. The good news is the weekend is here so the 2 day process won't be bad. The bad news is we are supposed to get a couple inches of rain between now and tomorrow at noon. I guess it will just take a little extra bleach. I'll post my results once I do the shocking.

    Thanks again.
    Keep pictures coming!!

    You could save all the empties and post something like this at the end:
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Cloudy Water after adding algecide

    I'll gladly take a few more pics and add them. I'm hoping my pile of bottles isn't that big but if it is, it is. Ill be buying a few more on the way home tonight just in case.

    One more comment on the test kit that I learned from using it just once... Trying to troubleshoot your pool water without a good one is like trying to troubleshoot electronic circuits without a good multi-meter. You can't just look at it and see the problem and therefore can't find the solution without a lot if time and $$ consuming trial and error.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

  9. Back To Top    #9

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    Re: Cloudy Water after adding algecide

    FCC held overnight. It actually went up 1ppm although my automatic feeder was off. It must get a little water through it.

    CC is .5 or less. I tested in increments of .5 and the water barely turned pink for the CC test. 1 drop brought it right back to super clear.

    Backwash water this morning was quite clear. Last backwash was last evening.

    The water is no longer cloudy. I can see the bottom clearly all around. The greenish brownish stain at the winter water level and below is still there. When I put my brush all the way to the bottom the white bristles have a greenish tinge. I can't tell if the water is greenish or if it looks that way because of the stain.

    It looks like the shock treatment is complete but the pool is still not right. Any hints on next steps would be greatly appreciated.

    Thanks.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Charlie_R's Avatar
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    Re: Cloudy Water after adding algecide

    Quote Originally Posted by Richard320
    You could save all the empties and post something like this at the end:
    That looks like a good substitute for a pool pillow! Tie them together in 3's and then several 3's together......
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Cloudy Water after adding algecide

    One more piece of info that I left out this morning with my readings and shock results. I added about 3.5 quarts of metal control a few weeks ago but have not added any since.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Re: Cloudy Water after adding algecide

    FC is still 15.5 tonight after a sunny day with the chlorine generator off (CC 0.5 or less). I removed the Trichlor from the feeder to get a good feel on the drop between tonight and tomorrow. About 1lb of Trichlor has been added to the pool since I started the shocking. I attached an updated photo. Still greenish but I can see bottom. I'm curious on what my next step should be if FC is stable overnight.

    Thanks.
    Attached Images Attached Images
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

  13. Back To Top    #13

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    Re: Cloudy Water after adding algecide

    Wow that's looking good!
    If you FC is stable through the night keep on keeping on.
    Keep the water at shock level until it clears.
    But you have really made hay in short order.
    Nice Job
    AGP: 27' x 52" : 17,500 gallon
    300 lb. Sand Filter (75 gpm) / 1.5 hp pump
    Full Sun ~ All Day

  14. Back To Top    #14

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    Re: Cloudy Water after adding algecide

    FC was stable overnight last night. There is less than .5 CC and the water is clear as in not cloudy. The color looks like it is a reflection of te stain below the winter water line. Is continued shocking really going to make it better? Or should I drop chorine and go for stain removal now? If I go for stain removal, should I add more Algecide? I added about 1/2 quart last week which is what turned my water cloudy.

    Thanks in advance for advice on next steps.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Charlie_R's Avatar
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    Re: Cloudy Water after adding algecide

    From Pool School, Defeating Algae....

    Algaecides rarely help and often cause problems. Copper based algaecides can cause unsightly copper stains that are difficult to remove, and can turn blond hair green. Linear quat based algaecides can cause foaming and bad smells. Polyquat based algaecides can be used as a preventive measure, but are ineffective at fighting algae once you have it. Polyquat is particularly useful when you are unable to maintain the FC level, such as over the winter or during an ascorbic acid treatment.
    I take this to mean that most algaecides are a no-no. Polyquat being the ONLY exception, and even then under specific conditions, for the purpose of allowing Ascorbic Acid treatment of stains.

    Please don't backslide into the use of goop that will only cause you more problems. You've come a long way already!
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

  16. Back To Top    #16

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    Re: Cloudy Water after adding algecide

    Thanks Charlie. I was actually referring to Polyquat in preparation for ascorbic acid treatment but I wasn't clear in my post I was getting ready to do that a week ago when I added the Polyquat and my pool quickly became the cloudy mess in the first picture. From Jason, this was more likely the clarifier in the polyquat coagulating particles than the actual algecide. I haven't found anything about shock treatment affecting the Polyquat that is already in the pool so I'm not sure if I should add more before the AA treatment. I'm nearly positive the hue in the water at this point is a reflection of the stained liner. You are correct, the pool has come a long way and going back to the old chemicals would be a mistake.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

  17. Back To Top    #17
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    Re: Cloudy Water after adding algecide

    As I recall from other threads here dealing with metals and on poolforum, normally you would take your FC level down close to 0 before adding the polyquat. But as my memory may be playing tricks on me, best to have one of the more experienced (read experts) weigh in on this.

    However (and you probably have already read through this), Here are the instructions for the AA treatment.

    One note: I've seen where towards the end of the process where you are adding small doses of chlorine back into the pool it is suggested that you add the bleach through the skimmer so the metals with precipitate onto your filter media instead of back onto your pool surfaces. Again, let's see what the experts have to say on this.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

  18. Back To Top    #18

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    Re: Cloudy Water after adding algecide

    Thanks Charlie.
    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

  19. Back To Top    #19

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    Re: Cloudy Water after adding algecide

    I LOVE Ascorbic Acid. Here is my final result. The 1 1/2 bottles of bleach and a week of filtering got me from the mud in the first photo to the clear green in the second photo. That little $7.50 packet of Ascorbic acid in front of the bleach got me to this final photo in approximately 5 minutes. It was the most amazing chemical reaction I've ever seen with the big blob of clear water forming and going around the pool (filter was on) then growing until the pool was totally clear.

    Of course, I need to rebalance the pool and get chlorine to hold again but I'm not worried at all about that. I spent 3 weeks on the pool prior to finding this site so I'm in the home stretch and very excited.

    Thank you to all who posted to help out with this issue.

    [attachment=0:2cvpz4dm]Clean Pool.JPG[/attachment:2cvpz4dm]
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    13,000 gal, AG, Hayward sand filter, 1 HP Pentair Dynamo (currently broken), 2008, use pool frog system

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    Re: Cloudy Water after adding algecide

    WOW!! that's about all I can say about that. WOW! That is a beautiful sight.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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