Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: Perfect chemistry, clean filter, yet cloudy water?

  1. Back To Top    #1

    Perfect chemistry, clean filter, yet cloudy water?

    TA 80, CH 280, FC 3, pH 7.5, CYA 50, borate 30.

    Two-adult bather load, nighly, every day. Full showers before entering spa, and we get out if we need to urinate.

    Water had been completely clear, absolutely pristine.

    A few days ago, it acquired a slight translucent look, kind of milky (but colorless).

    Shocking it with CL didn't fix anything.

    The filter is clean.

    The only recent change is that we haven't used it for the past five days because I was traveling and she was busy.

    Any suggestions?
    I have a 20 by 40 inground pool. Not sure of gallons but diving area is around 8 ft. with a shallow end. Sand filter and it is vinyl liner. I have a coverstar cover. Liner and cover new in 05.
    Not sure of flow rate.

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: Perfect chemistry, clean filter, yet cloudy water?

    I would up the FC to about 10ppm or so with bleach and hold it there while running the filter 24/7 and give that a day or so. It's not exactly shocking the pool but will probably clear up whatever is ailing it.

    If that yields no results, post back.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Jul 2011
    Location
    Central Califorina
    Posts
    208

    Re: Perfect chemistry, clean filter, yet cloudy water?

    When was your last water change? What is your daily FC loss? If you are losing more 50% FC daily with no bather load then you either have high organics due to lack of water change or you have a bug growing in your tub.

    If shocking to the CYA/Chlorine chart doesn't clear it I would consider a decontamination with superchlorination procedure. I do this with every water change at a 3 month interval. Maybe overkill but I had a bad experience with biofilm when I first got my tub.

    Are you using the Dichlor/bleach method. A CYA of 50 is high for a hot tub. 20 to 30 ppm would be better.

    Post back if you have more questions.
    3500 gallon 14x42 Intex Ultra Frame
    1/2 HP Intex 1600 sand filter/pump - Intex SWCG
    Two 4x20 Fafco solar panels.
    Taylor K-2006
    Marquis spirit hot tub - Grill Dome ceramic grill/smoker

  4. Back To Top    #4

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: Perfect chemistry, clean filter, yet cloudy water?

    Oops! Please disregard my advice. I mistakenly thought it was an IG pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Re: Perfect chemistry, clean filter, yet cloudy water?

    Quote Originally Posted by BBBliever
    When was your last water change?...Are you using the Dichlor/bleach method.
    Yes, we're using BBB.

    We've only had the spa for a couple of months, and the first month of that was spent battling Baqua. I drained, flushed, refilled, drained, flushed, refilled to get rid of hated awful Baqua, and then started BBB.

    So short answer is, the water was changed just a month ago.

    Quote Originally Posted by BBBliever
    What is your daily FC loss? If you are losing more 50% FC daily with no bather load then you either have high organics due to lack of water change or you have a bug growing in your tub.
    When I left, there was only about 1% FC. She put a teeny amount of Dichlor in each day (1/2 teaspoon in a 280-gallon spa), for the five days I was gone, and ran the jets after each addition. On the fourth day I was gone, she said the water had gotten cloudy. When I measured it today (six days since I left), the FC was 5 (I reported 3 in my original post, but that's a typo). So it seems like the FC loss is reasonable?

    Quote Originally Posted by BBBliever
    If shocking to the CYA/Chlorine chart doesn't clear it I would consider a decontamination with superchlorination procedure.
    When she reported the cloudiness, I suggested 1+1/2 teaspoons, but that may not have been enough of a shock. I'll go add some more and see what happens.

    Quote Originally Posted by BBBliever
    A CYA of 50 is high for a hot tub. 20 to 30 ppm would be better.
    Thanks for noting that. The CYA is the highest it's ever been, and I'll start using bleach now instead of Dichlor.[/quote]
    I have a 20 by 40 inground pool. Not sure of gallons but diving area is around 8 ft. with a shallow end. Sand filter and it is vinyl liner. I have a coverstar cover. Liner and cover new in 05.
    Not sure of flow rate.

  6. Back To Top    #6

    Join Date
    Jul 2011
    Location
    Central Califorina
    Posts
    208

    Re: Perfect chemistry, clean filter, yet cloudy water?

    I assume you properly converted from baqua$pa to chlorine and changed the filter out, Am I correct??? It takes more than several drain/refill's. You should have used ALOT of bleach for that conversion process after a drain a refill. I would have used a spa system flush to clean the plumbing out as well.

    If I were you I would drain 30% of your water, easy for a tub. Then you could use a lower FC level with the reduced CYA level.

    How are you testing your water???

    Once you get rid of the Baqua/Biofilm dichlor/bleach should be very easy. As I said when I first got my tub I ran into problems with biofilm, got spa stored, then found informative forums like this. I have never had water chemistry issues since.
    3500 gallon 14x42 Intex Ultra Frame
    1/2 HP Intex 1600 sand filter/pump - Intex SWCG
    Two 4x20 Fafco solar panels.
    Taylor K-2006
    Marquis spirit hot tub - Grill Dome ceramic grill/smoker

  7. Back To Top    #7

    Re: Perfect chemistry, clean filter, yet cloudy water?

    Quote Originally Posted by BBBliever
    I assume you properly converted from baqua$pa to chlorine and changed the filter out, Am I correct??? It takes more than several drain/refill's. You should have used ALOT of bleach for that conversion process after a drain a refill. I would have used a spa system flush to clean the plumbing out as well.
    I did the conversion by fully draining, filling, bleaching, flushing, replacing the filter, draining, filling, flushing, and replacing the filter again.

    Here's what it looked like when I was done:

    photos-of-a-successful-spa-conversion-from-baqua-t38539.html

    Note how pretty the water looks. That's why the onset of cloudiness is so upsetting.

    Quote Originally Posted by BBBliever
    How are you testing your water???
    A proper test kit, per the BBB descriptions. Little drops, tubes, etc. No test strips.
    I have a 20 by 40 inground pool. Not sure of gallons but diving area is around 8 ft. with a shallow end. Sand filter and it is vinyl liner. I have a coverstar cover. Liner and cover new in 05.
    Not sure of flow rate.

  8. Back To Top    #8

    Join Date
    Jul 2011
    Location
    Central Califorina
    Posts
    208

    Re: Perfect chemistry, clean filter, yet cloudy water?

    It sounds like you just let your CYA/Chlorine relationship get out of whack. With a CYA of 50 ppm your minimum FC should be 5 ppm. You stated it was down to 1 or lower a few times. Shock level for 50 ppm CYA is 20 ppm FC. A shock will probably clear your water right up.

    Low CYA levels like 30 can be difficult to read. What I would reccomend you do upon water change is add about 1.5 teaspoons of dichlor. Test to see how much that raised your FC. Lets say it was 5 ppm then multiply the dose times 6 or to get a total of 30 ppm FC. Take that total amount of Dichlor and place it in a ziplock bag. Then add only that to your tub over the next week or so.
    Hope ghat helps you. Enjoy the tub.
    3500 gallon 14x42 Intex Ultra Frame
    1/2 HP Intex 1600 sand filter/pump - Intex SWCG
    Two 4x20 Fafco solar panels.
    Taylor K-2006
    Marquis spirit hot tub - Grill Dome ceramic grill/smoker

  9. Back To Top    #9

    Re: Perfect chemistry, clean filter, yet cloudy water?

    Quote Originally Posted by BBBliever
    It sounds like you just let your CYA/Chlorine relationship get out of whack. With a CYA of 50 ppm your minimum FC should be 5 ppm. You stated it was down to 1 or lower a few times. Shock level for 50 ppm CYA is 20 ppm FC. A shock will probably clear your water right up.

    Low CYA levels like 30 can be difficult to read. What I would reccomend you do upon water change is add about 1.5 teaspoons of dichlor. Test to see how much that raised your FC. Lets say it was 5 ppm then multiply the dose times 6 or to get a total of 30 ppm FC. Take that total amount of Dichlor and place it in a ziplock bag. Then add only that to your tub over the next week or so.
    Hope ghat helps you. Enjoy the tub.
    Thanks!

    The weird thing is that CYA was only 30 a few days ago (I can measure it accurately with the special tube with the black dot at the bottom that came with the test kit). I'd been adding Dichlor to bring it up, thinking it should be at 50. Now it's at 50 and that's bad.

    Unfortunately it looks like the only way to bring down CYA is to drain some water and add more, which will put me back in water-chemistry **** because our starting water is difficult to work with.
    I have a 20 by 40 inground pool. Not sure of gallons but diving area is around 8 ft. with a shallow end. Sand filter and it is vinyl liner. I have a coverstar cover. Liner and cover new in 05.
    Not sure of flow rate.

  10. Back To Top    #10

    Join Date
    Jul 2011
    Location
    Central Califorina
    Posts
    208

    Re: Perfect chemistry, clean filter, yet cloudy water?

    6 months from now water chemistry will be second nature to you. You will be able to manage your tub with little effort and a routine will be established. Trial and error will get you there. We are here to help.
    3500 gallon 14x42 Intex Ultra Frame
    1/2 HP Intex 1600 sand filter/pump - Intex SWCG
    Two 4x20 Fafco solar panels.
    Taylor K-2006
    Marquis spirit hot tub - Grill Dome ceramic grill/smoker

  11. Back To Top    #11

    Re: Perfect chemistry, clean filter, yet cloudy water?

    I zapped it with bleach and, oddly, it cleared up and the CYA dropped, which shouldn't happen? Anyway, it seems to be back to normal.
    I have a 20 by 40 inground pool. Not sure of gallons but diving area is around 8 ft. with a shallow end. Sand filter and it is vinyl liner. I have a coverstar cover. Liner and cover new in 05.
    Not sure of flow rate.

  12. Back To Top    #12

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: Perfect chemistry, clean filter, yet cloudy water?

    Your CYA readings are accurate to +/- 10 ppm on that test. Also, a CYA of 50 isn't bad, per se, but I wouldn't allow it to get higher than that. Put the dichlor away if you haven't already done so. Good to know that your water cleared up.

  13. Back To Top    #13

    Join Date
    Jul 2011
    Location
    Central Califorina
    Posts
    208

    Re: Perfect chemistry, clean filter, yet cloudy water?

    Keep the FC up and you water will be clear. The CYA test is subjective and easy to misread at lower levels. There is no need for a CYA level higher than 30 ppm in a hot tub. Forget the CYA test and just keep track of FC via dichlor until you add a total of 34 ppm FC/dichlor after a water change. Then just add 5ppm FC/dichlor a month.
    3500 gallon 14x42 Intex Ultra Frame
    1/2 HP Intex 1600 sand filter/pump - Intex SWCG
    Two 4x20 Fafco solar panels.
    Taylor K-2006
    Marquis spirit hot tub - Grill Dome ceramic grill/smoker

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •