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Thread: Obsessive compulsive SLAM testing.

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    Obsessive compulsive SLAM testing.

    Soooo, hi. I'm new. I can't thank you (whomever "you" is) for putting the time and effort into making this site. One day our pool was clear and a tiny bit cloudy and BAAAMMMM!!! - the next day it's a swamp. Don't tell my husband, but I was tired of watching him fight this puddle of water. Here was his routine: come home from work and "check the pool", ie. dump a Tonka truckload full of pucks in the floaty thing and sprinkle dust in the water and vacuum. I knew something was wrong with either him or him. So, I decided that I don't have enough to worry about but I'd like to take on the giant humidity maker in the backyard. I asked Google what to do and he told me about TFP. Google is smart. Thank you, Google. I spent about three hours reading and going from understanding to being confused as-all-get-out and then understanding again. I obediently ordered the test kit and started dumping bleach in the watering hole until it arrived. I opened the kit like it was a delicate golden egg full of fun and possibilities. I spent time getting to know Precious and learning her ways and running every test available. The satisfaction is glorious; an entire science lab in my kitchen.

    I'm slamming the pond right now. I started on the Saturday the 11th at 6:00pm. The CYA was -20 when I started...Jeez. When I started, I had put the CYA in a sock like instructed, but I put that sock into the floaty puck thing... THIS DOES NOT WORK. I then took said sock and tied that sucker with a zip-tie to the leg of our removable ladder and placed it in front of the water return where it can get the heck beat out of it. THIS raised my CYA from below 20 to 30 in less than 24 hours! I am maintaining a CYA of 35 now and I am bouncing between 14 and 16 for my FC. I have tested 9 times since I started at 6:00pm on Saturday, the last one being at 5:50pm this evening.

    Finally, my question: It is my understanding that when NOT slamming and Pool Math decides the water needs some CYA, I should add the CYA and then NOT test for the CYA again for a week. However, WHEN slamming, should I still be checking AND adding CYA (if suggested to add) at least twice a day? Or should I not add anymore CYA for a week, as if I weren't slamming? Did I just implode your brains with the double negatives? I don't mind testing for the CYA, I just don't want to over-do the CYA...of course, now that I've said that, I remember that Pool Math is always right...so it doesn't matter, huh?
    I'm only focusing on the FC and CYA right now, so I don't have a full set of numbers for you right now. I do know that my CC was zero at last test time because I wanted to play with it.

    Okay...blast away; I'm terrible about long posts.
    2014 - 22'x52" - 11400 gallon AG vinyl Intex - Krystal Clear Filter Pump model #633T 110 volt, 60 Hz, 3.3 amps - B size cartridges - on Texas coastline.
    I'm new to TFP, but have already purchased the TF100 kit plus a complete refill. Oh, my pump horse power is questionable, I'm fairly confident that tiny little unicorns make it run.

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    Mod Squad woodyp's Avatar
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    Re: Obsessive compulsive SLAM testing.

    Welcome. Test the cya level------take it to 30 if not there, use 30 level cya for SLAM value-------and FORGETABOUTIT till the SLAM is done. There..........You're now cured!
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    northrn's Avatar
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    May 2014
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    Re: Obsessive compulsive SLAM testing.

    Welcome!

    Do not add CYA twice a day! Test initially, add enough CYA via sock to get to target level (or just under), and then assume it's there. It will take a week or so to show up on a test so save your reagents. After a week, test again. Then adjust if needed.
    27' AG 18K Gallons ~ Cartridge Filter ~ Pentair 1.5 HP Pump

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    Richard320's Avatar
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    Re: Obsessive compulsive SLAM testing.

    New TF100

    CYA is generally set it and forget it for a month or so. If you know how much you added, you should have a good idea of where your CYA level is, if you use Effects of Adding Chemicals at the bottom of poolmath.

    CYA only leaves by backwashing or splashout. Once you get your level established, that's it. You are at a good level to SLAM right now, so leave it alone. Whatever amount you calculated, use that to determine shock level.

    During the SLAM, all you worry about is FC & CC. If you started at 20ish CYA and you added enough to raise it to 40, use 40 as your CYA level to determine shock level. Whatever you targeted, assume it's there. When the SLAM is all done and the FC falls off below 10, then you can run all the tests again and fine tune the rest. You can fix pH, TA, and CYA in an hour once the pool is clear. Low CH will never be a problem in a vinyl pool, so you can test it, but you don't necessarily need to do anything to raise it. You might need to lower it some if your husband favored Cal-hypo to chlorinate, but that's a topic for later. And coming off a SLAM, FC should be adequate.

    It'll make sense once you start fine tuning things. You're just off to a rough start with an algae bloom.
    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: Obsessive compulsive SLAM testing.

    Welcome to TFP! Go easy on your husband, as he is gonna feel a bit depressed after he sees your results! Oh, nobody as mentioned it yet, but we LIKE PICTURES!
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  6. Back To Top    #6

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    Jun 2015
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    Texas City, Texas - one mile from Gulf of Mexico
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    Re: Obsessive compulsive SLAM testing.

    Thank you all for your input. Richard, I've read a bajillion of your replies and have learned a great deal and will continue, it appears. Thank you all, again.

    - - - Updated - - -

    LOL...I like to be right and awesome, so I'm gonna bask in this one. Nah...he's the one in there vacuuming the swamp, so it's a dual attack. Next time...pics.
    2014 - 22'x52" - 11400 gallon AG vinyl Intex - Krystal Clear Filter Pump model #633T 110 volt, 60 Hz, 3.3 amps - B size cartridges - on Texas coastline.
    I'm new to TFP, but have already purchased the TF100 kit plus a complete refill. Oh, my pump horse power is questionable, I'm fairly confident that tiny little unicorns make it run.

  7. Back To Top    #7
    Beens's Avatar
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    Re: Obsessive compulsive SLAM testing.

    Welcome to TFP! I think you're gonna like it here!

    Your first post had me giggling here in bed. (I should be sleeping but I'm addicted to TFP.)

    Go easy on that cya. Easy to add...pain in the neck to remove.

    I think everyone has you covered for advice so I'm just going to hang out on the welcome committee / cheer leading squad.

    Oh and.... +1 for pictures!
    18' x 48" (42" water depth) Intex Metal Frame 6,700 Gallons
    Hayward Power-Flo LX 1.0 HP pump
    Hayward Pro Series S166T Sand Filter
    Original Intex Floating Skimmer

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