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Thread: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

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    Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    I bought this swg for my Intex 18x48 pool with a 4000gpm Hayward pump which is the max they say the unit is good for. My problem is my chlorine level dwindles over a few days to the point I keep getting algae (FC was 2ppm last night). I tried the unit with cya levels from 30-60 and still keep having problems. Salt levels are 3200ppm. When ever I get the algae I SLAM the pool and start over by increasing the run time from the recommended 4 hours to now 9 hours of run time and it doesnt help. Does anyone else have this problem. Does anyone know if reducing the water flow (maybe install a valved/chokeable bypass) to slow the water down through the unit might help? I never had this problem with the older style Intex SWG.
    Intex 18ft dia. Ultraframe, 6500 gal. above ground Intex pool with Hayward C550 cartridge type filter and Intex Krystal Clear Ozone and saltwater system model ZS8110, Taylor K-2006 test Kit, Pool filter supplemented with Duda Diesel 1 micron filter bag
    Located in Cypress, Tx.

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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    Ideally you want your CYA level at around 75 for the SWG to keep up. Try that and make sure the cell is clean in the SWG.
    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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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    The documen tation states that the CYA should be 30 and maintain the FC @ 0.5 - 3ppm
    "Test the pool water every week to maintain the proper sanitizer level.
    It’s very important that the free chlorine is between 0.5-3 ppm
    ."


    I wonder if the water is running too fast through the unit, somewhat similar to air travelling too fast across and a/c coil doesn't remove enough humidity.
    Intex 18ft dia. Ultraframe, 6500 gal. above ground Intex pool with Hayward C550 cartridge type filter and Intex Krystal Clear Ozone and saltwater system model ZS8110, Taylor K-2006 test Kit, Pool filter supplemented with Duda Diesel 1 micron filter bag
    Located in Cypress, Tx.

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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    From the Manual

    Preferred Water Chemistry Reading

    Free Chlorine min 0 Ideal 0.5 - 3 ppm Max 5.0 ppm
    Combined Chlorine min 0 Ideal 0 ppm Max. 0.2 ppm
    pH 7.2 7.4 - 7.6 7.8
    Total Alkalinity 100 ppm 100 - 140 ppm 140 ppm
    Calcium Hardness 150 ppm 200 - 400 ppm 500 - 1000 ppm
    Stabilizer (Cyanuric Acid) 10 ppm 20 - 40 ppm 50 ppm
    Intex 18ft dia. Ultraframe, 6500 gal. above ground Intex pool with Hayward C550 cartridge type filter and Intex Krystal Clear Ozone and saltwater system model ZS8110, Taylor K-2006 test Kit, Pool filter supplemented with Duda Diesel 1 micron filter bag
    Located in Cypress, Tx.

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    Mod Squad pooldv's Avatar
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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    The manual is wrong. The pool industry does not get the water chemistry right in almost all cases. Crazy, I know!

    Here is how TFP recommends to balance a saltwater pool.
    Pool School - Water Balance for SWGs
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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: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    so a CYA of ~10ppm less will allow my chlorine level to drop that far when running the unit more than twice as long as recommended? I'm starting to wonder if it's defective. I've been running since June 3 of this year and the chlorine levels have always been dropping and I've had to supplement with bleach to keep them up.
    Intex 18ft dia. Ultraframe, 6500 gal. above ground Intex pool with Hayward C550 cartridge type filter and Intex Krystal Clear Ozone and saltwater system model ZS8110, Taylor K-2006 test Kit, Pool filter supplemented with Duda Diesel 1 micron filter bag
    Located in Cypress, Tx.

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    Mod Squad pooldv's Avatar
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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    Yes, CYA of less than 10 will allow your chlorine to be burned off by the sun in minutes. Also, algae can use up that much FC in a short amount of time too. Use bleach to help the SWG keep the FC at target. To check for algae raise the FC to 10 and Pool School - Perform the Overnight FC Loss Test (OCLT).
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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: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    The times I SLAMed the pool and always followed OCLT. My CYA is 10ppm less than 70 (60ppm), not 10. Still with the unit running more than twice as long, I'm surprised it doesnt keep up.
    Intex 18ft dia. Ultraframe, 6500 gal. above ground Intex pool with Hayward C550 cartridge type filter and Intex Krystal Clear Ozone and saltwater system model ZS8110, Taylor K-2006 test Kit, Pool filter supplemented with Duda Diesel 1 micron filter bag
    Located in Cypress, Tx.

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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    Pooldv has got you covered. Here is a link that may help you.

    Pool School - Chlorine / CYA Chart

    - - - Updated - - -

    And another link.

    Pool School - Water Balance for SWGs
    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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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    Quote Originally Posted by gtty View Post
    I bought this swg for my Intex 18x48 pool with a 4000gpm Hayward pump which is the max they say the unit is good for.
    4000gpm?!? This I gotta see!
    17.4k gallon IG pool with attached spa (spa itself is 730gal), Super Blue Diamondbrite plaster, Circupool SI-45+ SWG, BH/Hayward Cartridge Filter, 2hp 2speed Hayward Super II pump, , Jandy Valves, Waterway Skimmers, Rheem 400k Heater, Polaris 360 cleaner, built 2000+-, replastered June 2015, TF-100 kit---Here's my pool test reading history

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    Mod Squad pooldv's Avatar
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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    Ok 60 CYA isn't too bad. Have you checked the cell for calcium build up or cleaned it recently? If the cell is clean then the only thing that can be consuming your chlorine that fast is algae.
    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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    Re: Trouble with Intex Intex Krystal Clear Saltwater System and Ozone Filter

    Quote Originally Posted by gilbee View Post
    4000gpm?!? This I gotta see!
    Here they are http://www.marineinsight.com/wp-cont...3/11/pumps.jpg


    OK 4000 gpH only off by a factor of 60

    - - - Updated - - -

    Quote Originally Posted by pooldv View Post
    Ok 60 CYA isn't too bad. Have you checked the cell for calcium build up or cleaned it recently? If the cell is clean then the only thing that can be consuming your chlorine that fast is algae.
    I have had this problem since I bought the SWG. I started at their recommended CYA level and have been increasing it. Everytime I increased the CYA, it was asfter a SLAM and OCLT. It takes a little over a week and a half for the chlorine to drift down and Algae to bloom. I'll get some fresh numbers from the test kit and repost.
    Intex 18ft dia. Ultraframe, 6500 gal. above ground Intex pool with Hayward C550 cartridge type filter and Intex Krystal Clear Ozone and saltwater system model ZS8110, Taylor K-2006 test Kit, Pool filter supplemented with Duda Diesel 1 micron filter bag
    Located in Cypress, Tx.

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