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Thread: 2nd SLAM of the season

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    Join Date
    Jul 2014
    Location
    Shawnee/KS
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    15

    2nd SLAM of the season

    Just started my second SLAM of the season. After the first SLAM the water was clear for about a 1.5 months but I didn't stay on top of it and I still have not figured out what the best run time and % to run the SWG. Before this SLAM my numbers were:

    FC: 1
    CC: 0
    CH: 100
    TA: 60
    CYA: 45
    Cl: 1
    pH: 7.8
    Salt: 3500

    I added 5.6 96oz of 8.3% bleach per pool math to get the FC up to 18 and added about 6oz of Muriatic acid to get the pH to 7.4 about 30 min before the bleach, not sure the concentration. It was the green eco friendly jug from Lowes.

    After adding the bleach, I brushed the pool then retested about 3 hours after adding the bleach. Not sure how the FC jumped so much.

    FC: 27.5
    CC: 0.5
    Cl: >5 looked orange
    pH: >8.2

    I'm leaving the pump to run overnight with the SWG set at 0% and will try to retest in the morning to see how much FC I lose.

    I plan to try to keep the FC at 18 until I pass the overnight FC loss test. Not sure why the FC jumped up so much and what to do if it stays that way overnight. Then I will bump the CYA up to 70.

    Does this sound right?
    IG 21,600 vinyl gal 38'x20' 3.5'/8', Pentair Sand Dollar SD80 filter, Pentair 1.5HP pump, Auto Pilot Salt Chlorine Generator RC 28. 2 LED lights, 2 bubblers.

  2. Back To Top    #2
    bobodaclown's Avatar
    Join Date
    Apr 2011
    Location
    Lakeland, FL
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    2,351

    Re: 2nd SLAM of the season

    Not sure about the eco friendly acid. Your pH should have gone down. Not up Check the ingredients.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    bobodaclown's Avatar
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    Apr 2011
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    Lakeland, FL
    Posts
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    Re: 2nd SLAM of the season

    Your plan of attack seems reasonable.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    cowboycasey's Avatar
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    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: 2nd SLAM of the season

    with a CYA of 45 your SWG is working to hard to keep your FC level, good job taking CYA to 70..

    finish SLAM and set your SWG at 50% and run you pump 8 hours and when it is done check fc, then check again right before your pump and SWG turn back on... If 1 of those times you measure fc below what your recommended level is, add more time to pump or raise SWG level, if more fc then less run time or SWG..

    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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