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Thread: How long can SLAMs run?

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    Ronald U.'s Avatar
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    How long can SLAMs run?

    Greetings. I have been slamming for 9 days. Have SLAMmed in past, never more than 3 days. Began this time with wall green algae bloom, mostly in places I know to have poor circulation. (I have noted that taking sample from these spots can show FC 3 points less than a spot near return jets.) Water looks good, but I am unable to get to CC</=0.5 and OCLT passed. This AM (dawn) had: FC 15.0 (16.0 last night), CC 1.5, TA 70, CH 300, CYA 40, Borate 40. Three days ago I tossed in 1 gallon 31% muriatic acid just because a week had passed and I usually have to add acid weekly when things are in non-SLAM mode. I guess I'm just getting bored. / BTW, I'm thinking of changing out my jets to try to boost circulation. Any detailed tips? Thanks all.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Texas Splash's Avatar
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    Re: How long can SLAMs run?

    Well Ronald, if you've been through this SLAM process before, you know that it can be a little finicky. Even though your previous SLAMs were short, often times they go at least a week, and some really green (thick) pools take 2 weeks or more. So patience and a cold drink will serve you well.

    Probably a variety of return jet options for you depending upon the style that you currently have. Some retrofits on-line, while some people grab some fittings from the store and make it a DIY project. You're welcome to post a pic of your jets. Maybe someone will be able to point you in the right direction.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    Day 11. OCLT 2.0, CC this am 1.5. Water clear. Like I was told in a gas station line during the Hurricane Rita mass evacuation: I need to cowboy-up and wait like everybody else.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Mod Squad woodyp's Avatar
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    Re: How long can SLAMs run?

    Yeah.....but you're gettin' there! Keep at it!
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    Re: How long can SLAMs run?

    My slam this spring lasted almost a month. I had to get rid of ammonia first and then slammed until the could pass the OCLT. Keep testing and slamming and you will get there.


    15000 gal, IN, Hayward Super Pump VS, Hayward Heat Pro Titanium heat pump model number HP2110T, vinyl, Dolphin Apollo.
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    lovestoswim's Avatar
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    Re: How long can SLAMs run?

    Slamming a foreclosure right now that started very greenish brown on 5-30. Just now able to see into the deep end Like the others have said it can take time and lots of patience.

    What does your pool water look like?

    Wooops - just saw your water is clear! Sounds like your getting close
    24,000 gallon, 21x43 Oval Wilbur AGP installed June 2015. 10'X24' deck. 2hp Aqua Pro Cartridge Filter. Using TFP method.

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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    This am still cannot call SLAM done. OCLT is 1.0 but CC 1.5. What is confusing to me is that the water has been clear right from the start. I began SLAM due to 6 or so palm size patches green algae growing on walls. / CYA has fallen from 40 5-29-16 to a bit below 30 6-6-16. We've had several inches of rain in that period and I don't drain excess water.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Mod Squad pooldv's Avatar
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    Re: How long can SLAMs run?

    I had some algae patches last summer with clear water and CC 0 every time I tested. Sounds like you are staying ahead of the algae and keeping the pool clear. Keep SLAMing and brushing as much as you can, you'll get it.
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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    Day 15 SLAM. OCLT 1.5, CC 1.0 this am. Perhaps I'm close. Haven't seen any algae since second day of SLAM. I never knew SLAMs take so long with pool water looking so good. I had the conception that only green swamps took many weeks to SLAM. Live and learn. Thanks for all the help and encouragement.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Texas Splash's Avatar
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    Re: How long can SLAMs run?

    Yes, the numbers don't lie, so those little organics are still in there somewhere - even if they are transparent to our eyes. You're doing well and getting closer. Have a great day.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    Just to fill in water details: pH unknown as I hear reading not accurate with high FC; TA 60, CH 250, CYA 30, Borate 40. I have trichlor pucks in feeder now to raise CYA towards 40. Should I dump in some acid just because pool usually needs it weekly, or leave things be?
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Texas Splash's Avatar
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    Re: How long can SLAMs run?

    I wouldn't guess on the acid part. If you were concerned due to the length of your SLAM, simply let our TX sun beat that FC down to about 8 or 9, run a quick pH test, adjust as necessary, then crank it (FC) back up to 16.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    Still at it, and it seems I am losing ground. OCLT 2.5, CC 2.0 this am. CYA has upped to approx. 35 with trichlor pucks. (I take out pucks at night for OCLT purposes). I dumped in another 1/2 gallon 31% MA this am along with 1/2 gallon 8.25% bleach. I am lazy and have not been brushing walls every day. There has been NO visible algae since Day 2 of SLAM. Another thing I haven't done: guess I will try pulling out pool light (I am scared of electricity) and cleaning niche this evening.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Texas Splash's Avatar
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    Re: How long can SLAMs run?

    The light niche shouldn't be too terribly difficult, but do remember to shut-off power first. The niche is filled with water to keep the bulb cool, so you don't want it to come-on after you pull it. Since you have elected to leave the pucks in the chlorinator, and your CYA has risen to 35, I would increase the FC to "16" which correlates to a CYA of 40. Always best to round-up CYA results when it gets to mid-way between numbers. Of course the brushing and other items on the SLAA page are of equal importance, and the more consistent you are with those task the quicker the SLAM will go. Have a nice weekend.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    OCLT 2.0, CC 1.0. Nothing much found in light niche, just what seemed to be off white-grey plaster dust accumulated on bottom. Found some algae in my water sample bottle, bleached that but alas, still on the SLAM. Trying to be patient!
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    SLAM Day 20.
    This am: no OCLT run.
    FC 13.0
    CC 2.5
    TA 50
    CH 275
    CYA 35
    Something keeps creating high CC. I don't know where to aim next. I don't see algae, not since Day 2, and the water is clear. Should I clean the DE filters? Pressure is within 25% of initial, though it has been 6 mos since last cleaning. I feel frustrated and puzzled.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    needsajet's Avatar
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    Re: How long can SLAMs run?

    I agree with everyone above, especially brushing and keeping at it, and I also wonder about sources. I've read some off-the-wall things here and on other forums, so I'll just mention what comes to mind.

    Not suggesting you have any of these situations, but some I've heard are: water runoff from a garden (sprinklers that ran at night); fertilizer from a lawn; algae hiding in a ladder frame, under a diving board, growing behind a skimmer weir, growing inside wedding cake steps, dirty pool toys, rock waterfall hiding algae; recycled water from sprinklers; bat poo; ducks using the pool; someone else fertilizing gardens nearby with seaweed fertilizer; rain driving dirt in from a patio; dogs in and out; leaves and other stuff not removed from pool, skimmers, pump baskets; algae in unpainted solar pipes; unused unpainted plumbing circuits.

    Seems to me there's a possibility of an unidentified contaminate source when the water is clear and continued OCLT fails and high CC.

    Just the other day someone mentioned a dead critter in a filter?!? I'm pretty sure that one had to be a joke!

    Good luck and keep at it
    12k IG salt; glass beads in plaster; K-2006C, K-1766, CCL, and Aussie 4in1 (HTH); Pentair Eco800 1.2HP VS; Zodiac SWC 1.3 lb/day (25 g/hr); 25" filter recycled glass; OKU solar panels; 1/2 HP solar pump; Rebel (Warrior) pool cleaner; FlowViz; prior pool AG 10k | Read Before Posting to get the best possible advice | ... and this helped me a lot!: TFPC for Beginners

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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    Ugly thought, and perhaps diverting culpability away from myself: Could my Taylor R-0003 DPD Reagent be off specification and chronically creating increased CC reading? I did switch to a new bottle sometime in recent weeks, uncertain exactly when.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Ronald U.'s Avatar
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    Re: How long can SLAMs run?

    Day 21 SLAM. No algae since Day 2. Water quality has been clear all along.
    7:30 am results:
    OCLT 1.0
    FC 15.0
    CC 1.5
    TA 50
    CH 275
    CYA 35
    Someone talk me out of it. I'm considering abandoning the SLAM. Then wait and see if I get an algae bloom while maintaining TFP water specs. Help!
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    Re: How long can SLAMs run?

    Have you broken down and cleaned your DE filter inside and out? Last year I SLAMed my pool and it was a success, but after about 3 weeks I have a slight algae bloom and did a re SLAM but it would not clear. I broke down the DE filter and all the material was super green! I had to let the filter soak over night In cleaning chemicals to get it back to whitish color. That would be the next thing I would look into
    20x40 in-ground Liner Pool, 2 Skimmers & 2 returns. 1.5 hp Starite pump and Hayward EC65 DE filter.

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