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Thread: First day with test kit..... look out mustard algae!

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    Modawg2k's Avatar
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    First day with test kit..... look out mustard algae!

    Hey guys, lovely 3 year old swg pool received it's first pool test kit (and not the strips). I took two readings so here are the numbers

    Test #1 which i'im not sure if i did it right
    pH > 8
    FC 1.4
    CC 0
    TA 90
    CYA : not sure if I ran the test correctly. I could see the dot all the way down if I just looked right.


    Between test, i added bleach 12% and muriatic acid in quantities based off the pool calculator.

    Test #2 (about an hour a half later)
    pH 7.6
    FC 3.2
    CC 0.0
    TA 110
    CYA: Stilll not sure how to run the test appropriately. I can still see a bit of the black dot when the container is full of water.


    ANyways, what's my start! Water currently is clear. FLoor and walls looks drity (mustard algae?)
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    frustratedpoolmom's Avatar
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    Re: First day with test kit..... look out mustard algae!

    Save your reagents and use the 10ml sample test for FC.

    Sounds like your CYA is low, if you did the test correctly.
    Check out this link
    http://www.taylortechnologies.com/Ch...P?ContentID=36

    On the TA test, your TA couldn't have gone up 20 if you added acid - acid lowers TA. So that's testing error.
    Wipe the tip of the R-0009 dropper bottle after each drop with a damp cloth to eliminate static so you get uniform drop sizes.

    Do you see visible green algae? or are you seeing brown dust?

    Tonight do an OFCLT (Overnight FC loss test) with the SWG off to see if your Free Chlorine is holding. If you lose more than 1ppm, you need to do a shock PROCESS on the pool.

    Post back with any questions.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: First day with test kit..... look out mustard algae!

    If you have algae of any kind on the pool floor, it will brush up into a cloud. If it doesn't, you have some staining which can be addressed later.

    You are doing the CYA test fine. Calculate enough CYA dosage to get your pool to about 40 ppm (for now) but buy enough to get to 60 ppm. Test in several days and you will see the difference.

    Wiping that dropper tip on the TA is indicative of VERY fresh chemistry and will go away in just a week or so....meanwhile, do as FPM suggests
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    Thanks, will keep updated. Getting cya after work. I know solid form is best price, but where to get it? Walmart sells cya? Or should I be hitting up a pool store like leslie's?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: First day with test kit..... look out mustard algae!

    Quote Originally Posted by Modawg2k
    Thanks, will keep updated. Getting cya after work. I know solid form is best price, but where to get it? Walmart sells cya? Or should I be hitting up a pool store like leslie's?
    Walmart should have the HTH brand. Pool store will have it dor sure. Also the pool section (look in the garden area) at Lowes and Home Depot. I've seen it as Ace Hardware too.
    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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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    Walmart best price on this chemical ?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Isaac-1's Avatar
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    Re: First day with test kit..... look out mustard algae!

    It depends around here they only sell trichlor and cal-hypo chlorine products, and some / most also contain copper (avoid these) I usually get most of my stuff at Lowes.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    I went ahead and bought the Walmart HTH CYA. According to my two initial tests, I have zero CYA.

    This bottle says to obtain my desired CYA, I will need more than just this 4lb bottle, but I know I should start low and go slow. Do I put this entire CYA into the socks and into my skimmer?? Seems like an awful a lot of powder


    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: First day with test kit..... look out mustard algae!

    Quote Originally Posted by Modawg2k
    I went ahead and bought the Walmart HTH CYA. According to my two initial tests, I have zero CYA.

    This bottle says to obtain my desired CYA, I will need more than just this 4lb bottle, but I know I should start low and go slow. Do I put this entire CYA into the socks and into my skimmer?? Seems like an awful a lot of powder


    Yep, it's true. But if you have less than 20 PPM, it'll read zero, so you might already have some in there.

    Hang the sock over the side or let it bob around hanging off a pool noodle or an empty bleach jug. You don;t want to restrict the flow in the skimmer.
    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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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    There they are! 4lbs divided among 2 socks..... how long until it will dissolve?

    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: First day with test kit..... look out mustard algae!

    What a beautiful sight! I am reminded of my teen days when we used to set trot lines to catch catfish. Looks like you got some nice ones!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    frustratedpoolmom's Avatar
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    Re: First day with test kit..... look out mustard algae!

    About a week, floating. Would dissolve faster tied in front of return. You can squish the socs with your hands to help it dissolve. Won't hurt anything. Wash your hands after.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    Thanks. The squishing definitely helped to get some out.
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    While I wait on CYA to build up, I wanted to address calcium. I'm in Phoenix so I have hard water.

    Here is my pools latest numbers from this early evening:
    FC: 4
    pH: 7.6
    CH: 680

    3 y.o. pool has history of scaling (ring around tile & white flecks on the floor). I perform semi-monthly maintenance on the SWG and it always has a decent amount of calcium buildup. I haven't done a great job of water maintenance during these 3 years.

    I tested the fill water 2 separate times and my numbers were
    Test 1: 175 (10ml sample)
    Test 2: 170 (25ml sample)

    Will proper water chemistry maintenance be enough to get that CH back to a normal level? Or should I not expect any less with Phoenix? Or should I be seriously considering some water drainage?

    Thanks!
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: First day with test kit..... look out mustard algae!

    Quote Originally Posted by Modawg2k
    While I wait on CYA to build up, I wanted to address calcium. I'm in Phoenix so I have hard water.

    Here is my pools latest numbers from this early evening:
    FC: 4
    pH: 7.6
    CH: 680

    3 y.o. pool has history of scaling (ring around tile & white flecks on the floor). I perform semi-monthly maintenance on the SWG and it always has a decent amount of calcium buildup. I haven't done a great job of water maintenance during these 3 years.

    I tested the fill water 2 separate times and my numbers were
    Test 1: 175 (10ml sample)
    Test 2: 170 (25ml sample)

    Will proper water chemistry maintenance be enough to get that CH back to a normal level? Or should I not expect any less with Phoenix? Or should I be seriously considering some water drainage?

    Thanks!
    Once Calcium is in the pool, it stays there. It doesn't evaporate. It will continue to rise with evaporation. Mine goes up about 25 ppm/week.

    If you play with the pool calculator some, you'll see the CSI number. Above .6 it will probably start growing scale. Below -.6 and it will start dissolving scale or etching plaster. Close to zero, you're good. See what happens to CSI as you shift numbers, including the temperature. By keeping pH and TA down at the low end, you can keep CSI neutral or slightly negative even with really high CH. Once you get about 900 CH you lose the wiggle room and have to start relacing some water.

    This is why we suggest testing early. If you wanted to lower CH, you could have done so before you started pouring expensive chemicals in the water! Too late now.... you've got too much happening all at once right now, so I'd advise holding off until things are balanced and the water is crystal clear. Then worry about partial drains. I use pool water on the lawn to reduce CH. It's a slow process, but it's less waste, and the pool is never out of commission.
    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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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    Thanks for the tip. I've been playing around with the csi calculator. It says I'm at a 0.12 now. Gives me a goal of -0.51, but then -0.6 is bad..... I'm guessing disregard that and stick as close to 0 like you said
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: First day with test kit..... look out mustard algae!

    Quote Originally Posted by Modawg2k
    Thanks for the tip. I've been playing around with the csi calculator. It says I'm at a 0.12 now. Gives me a goal of -0.51, but then -0.6 is bad..... I'm guessing disregard that and stick as close to 0 like you said
    If you have any scaling, -.5 will help loosen it, but at a glacial pace.
    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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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    Once I get my cya up, what can I expect as far as cya loss due to backwashing? Or is that too hard to determine because who knows how much backwashing I will be doing?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: First day with test kit..... look out mustard algae!

    Or is that too hard to determine because who knows how much backwashing I will be doing?
    Too hard, but it won't be much. perhaps you'll need to add more mid-season.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Modawg2k's Avatar
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    Re: First day with test kit..... look out mustard algae!

    While I am waiting for my CYA to raise, I've been thinking about how I will go about shocking. Should I be raising my cya to swg levels before shocking? Obviously that would mean quite the high level of fc to maintain shocking. Or should I stop halfway up on my cya journey to take time to shock?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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