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Thread: SLAM to open a SWG pool - ignore salt for now?

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    SLAM to open a SWG pool - ignore salt for now?

    Here are my numbers: FC=0, pH=8.2, CYA=0, salt is somewhere between 800 (strip test) and 1400 (SWG reading). Pool is deep green.

    No question I need to lower pH, but with the salt this low, should I still raise CYA to 70-80 before SLAMing, or can I treat it as a non-SWG pool for now and just raise CYA to 30 and start with the bleach?

    Or would dichlor be the right combo for me? I bought a dozen bottles of 8.25% bleach already, but I can save them for shock.
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
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    located in Central Virginia

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    Mod Squad jblizzle's Avatar
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    Re: SLAM to open a SWG pool - ignore salt for now?

    I would ignore the salt and treat it as a non-SWG pool until cleaned up.

    Did you previously have CYA in the water?
    If so, dropping to 0 with 0 FC, could be ammonia.

    Do this first, with the pump running, lower the pH to a target around 7.2, add 10ppm of FC and retest the FC and CC after 10 minutes and report back.
    Jason, TFP Moderator
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    Mod Squad jblizzle's Avatar
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    Re: SLAM to open a SWG pool - ignore salt for now?

    I have to run out.

    If you do the above and the FC has dropped a lot and the CC is high, keep dosing the FC up to 10ppm and checking every 10 minutes until the FC mostly holds and the CC is lower. Then continue with the below.

    Once the FC mostly holds and CC is fairly low, then raise the CYA up to 30ppm and follow the SLAM process.
    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
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    Re: SLAM to open a SWG pool - ignore salt for now?

    OK so I added the muriatic acid, got a little too much in there, and now my pH is reading 6.8. TA = 40. I have a good amount of sodium carbonate, so I am going to add that and let it circulate for a while, then check again.
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by cbosterhus View Post
    OK so I added the muriatic acid, got a little too much in there, and now my kit is reading 6.8. I have a good amount of sodium carbonate, so I am going to add that and let it circulate for a while, then check again.
    If your TA is 90 or better, the pH will rise fast enough that you don't need to bother with the pH adjustment. Get the algae before it grows any more.
    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: SLAM to open a SWG pool - ignore salt for now?

    And if TA = 40?
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by cbosterhus View Post
    And if TA = 40?
    Raise pH to 7.2 and then it's jugs away!

    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: SLAM to open a SWG pool - ignore salt for now?

    OK thanks, Richard!
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Re: SLAM to open a SWG pool - ignore salt for now?

    OK, pH is in the 7.2-7.5 range so I added 4 121-oz jugs of 8.25% chlorine. PoolMath said add 444 oz or 3.7 of the 121 oz jugs to increase FC from 0 to 10 - but I only get FC = 5 with the scoop test. Just repeated the test 30 min later and it's still only 5.

    Good news is, I can see it's doing something to lighten up the deep green! And we have a cloudy day.

    Should I add 4 more jugs of Cl right away?
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by cbosterhus View Post
    OK, pH is in the 7.2-7.5 range so I added 4 121-oz jugs of 8.25% chlorine. PoolMath said add 444 oz or 3.7 of the 121 oz jugs to increase FC from 0 to 10 - but I only get FC = 5 with the scoop test. Just repeated the test 30 min later and it's still only 5.

    Good news is, I can see it's doing something to lighten up the deep green! And we have a cloudy day.

    Should I add 4 more jugs of Cl right away?
    No. 2 Jugs is what poolmath calls for. It will go through bleach fast early on, but don't just assume that 4 jugs equals 5 FC. You don't want to bleach the liner.
    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: SLAM to open a SWG pool - ignore salt for now?

    Well, I should have waited for your reply I added four more bottles and got an initial FC of 11.5, then checked again 30 min later and it is up to 25! I haven't added any CYA yet, and conditions are cloudy and drizzle, air temp in low 60's. Guess I'll leave it alone for now; anything else I should do today?
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by cbosterhus View Post
    Well, I should have waited for your reply I added four more bottles and got an initial FC of 11.5, then checked again 30 min later and it is up to 25! I haven't added any CYA yet, and conditions are cloudy and drizzle, air temp in low 60's. Guess I'll leave it alone for now; anything else I should do today?
    Brush and vacuum. Recheck FC and CC in a couple hours. Post your results.
    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: SLAM to open a SWG pool - ignore salt for now?

    FC=15-18 (hard to judge precisely) and CC=2-4 (same).
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Mod Squad jblizzle's Avatar
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    Re: SLAM to open a SWG pool - ignore salt for now?

    And get the 30ppm of CYA dissolving in a sock in front of a return jet or in the skimmer.

    Your FC is WAY too high for no CYA in the water.
    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
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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by jblizzle View Post
    And get the 30ppm of CYA dissolving in a sock in front of a return jet or in the skimmer.

    Your FC is WAY too high for no CYA in the water.
    The good news is he doesn't have Ammonia. All that FC would be gone by now if he did.
    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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    Mod Squad jblizzle's Avatar
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    Re: SLAM to open a SWG pool - ignore salt for now?

    Yup, ammonia is certainly not a problem.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: SLAM to open a SWG pool - ignore salt for now?

    It rained all night Saturday night.

    I tested at 1:45 pm and had FC=4.5, CC=1, pH 7.2 and TA=50. Added 4 lbs CYA and about 1.5 gal 10% bleach (only $2.50 at WalMart!)

    Tonight's numbers: FC=13, botched the CC test*, pH=7.2, CYA=37, TA=60. Water is clearing up well. I'm thinking I'm on the right track; am I right?

    *I think I now figured out that when the FC drop test goes clear color (not necessarily transparent, it still is a bit cloudy) then it's time to record the number. I put some extra drops in to see if it would get any clearer, but it didn't. After that I couldn't add enough R-0003 reagent to get it back to pink, even after 20 drops.
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by cbosterhus View Post
    It rained all night Saturday night.

    I tested at 1:45 pm and had FC=4.5, CC=1, pH 7.2 and TA=50. Added 4 lbs CYA and about 1.5 gal 10% bleach (only $2.50 at WalMart!)

    Tonight's numbers: FC=13, botched the CC test*, pH=7.2, CYA=37, TA=60. Water is clearing up well. I'm thinking I'm on the right track; am I right?

    *I think I now figured out that when the FC drop test goes clear color (not necessarily transparent, it still is a bit cloudy) then it's time to record the number. I put some extra drops in to see if it would get any clearer, but it didn't. After that I couldn't add enough R-0003 reagent to get it back to pink, even after 20 drops.
    What did you target for CYA?

    Anyway... with CYA at 37, shock level is now 16. If you calculated higher, then assume it's higher already and target the right FC for that CYA.

    Is the color improving?
    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: SLAM to open a SWG pool - ignore salt for now?

    I was aiming for a CYA of 30, but did the test indoors after dark so I'm not sure how accurate it was. Waiting for a 25 lb tub to come in the mail tomorrow before I add more CYA.

    Since I have a SWG system I'm headed for a CYA of 80 eventually, but probably not until I get salt in the water, right? Trying to get the water clear first, I think? The cell is turned off for now.

    Color is improving, yes, although I didn't get home until dark. I'll do a visual and test levels again in the morning before work.
    IG 26k gal, vinyl liner, Hayward S220T sand filter, Hayward SP2607X10 pump with Century UST1102 motor (single speed)
    Goldline AquaRite swg with Tcell-9
    TF-100 test kit
    located in Central Virginia

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    Richard320's Avatar
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    Re: SLAM to open a SWG pool - ignore salt for now?

    Quote Originally Posted by cbosterhus View Post
    I was aiming for a CYA of 30, but did the test indoors after dark so I'm not sure how accurate it was. Waiting for a 25 lb tub to come in the mail tomorrow before I add more CYA.

    Since I have a SWG system I'm headed for a CYA of 80 eventually, but probably not until I get salt in the water, right? Trying to get the water clear first, I think? The cell is turned off for now.

    Color is improving, yes, although I didn't get home until dark. I'll do a visual and test levels again in the morning before work.
    In that case, it sounds like you have things under control!

    Keep the CYA down until you finish the SLAM, then add the rest when you add the salt.
    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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