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    Weighing water samples

    If you already have the scale, then by all means go for it. But I would not suggest somebody buy a scale for the sole purpose of weighing the samples in an attempt to improve the accuracy of their results. Nor would I "use an eye dropper for fine adjustment" in my sample as you stated in your...
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    Weighing water samples

    Because in metrology (the science of measuring, what a fun class that was) you learn that the outcome of an experiment is only as accurate as the least significant figure of its components. So if you have water volume to 0.1 and your drop test measures to 0.5, increasing the accuracy of the...
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    Weighing water samples

    I am an engineer by training, a project manager by trade, and type A by nature. There are times when I get a little overboard with how exact I like things. However, when it comes to the pool, I am in the same meh stage as you. I don't know the exact strength of my chemicals - they have been...
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    How much bleach do you use weekly?

    You have the same size pool I do, and you are in NJ as well, so possibly the same weather patterns. My pool gets a LOT of sun, all day long. I just switched to SWG this season, so I'm still playing with those numbers, but when I used bleach, my pool was pretty much rock steady at loosing 1...
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    Silly Speedstir question

    I collect a cup of water from my pool, and then walk over to the pool shed. I do all the tests in the shed (except CYA of course) on a shelf, where I also have a clipboard hanging in case I want to record the results. It's also where I have a kitchen scale if I need to weigh out things such as...
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    Weekly Maintenance & Pump Running Time

    I am up the road a bit (well an hour or so) from you. What chemicals do I use to close my pool for the winter? From WalMart - about 4 gallons of bleach and a box or two of Borax From the pool store - A tub of dry acid Frist I clean the pool very well Then I use either the borax or dry acid...
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    Overnight trip - Looking for advice/suggestions

    I keep my CYA around 40 (it is below 30 right now, but that's another story). When I go away, usualy for for about a week to 10 days, I clean the pool very well the day before I leave (brush and vac), I raise the FC using bleach to about 9.0 ppm (I run around 3.0 average per day, and I lose on...
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    How much CYA in Stabilized Chlorine ?

    Yep, I figure I will get the CYA where I want it, and then rebalance the pH. My TA is pretty good, and it buffers the pH pretty well. For the most part my pool water is pretty stable - luckly. -dave
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    How long does SLAMing, on average take?

    I am in NJ as well. (Morris county) and it took me longer than normal to pass OCLT this opening - not as long as you though. My CYA was a touch low (but not 0) because of water loss and replacement, but I also noticed a LOT of organic matter in my pool this year. Leaves, pollen, and polynoses...
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    How much CYA in Stabilized Chlorine ?

    Over the winter my pool ended up leaking (we had a bad winter, and it froze deep enough to pull the plug out of my return). I ended up having to add much more water than I had to in previous years. Amyway, my CYA is now below 30. My pool is now burning through belach like it's going out of...
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    Another entertaining pool store visit

    The Leslie's by me only sells dry acid. They have a sign up explaining how it is safer, easier to transport, does not go bad (because MA does?), and is easier to use. I don't know if the town they are in prohibits selling liquid MA, but I doubt it because the HD down the highway has it (but it...
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    The infamous DPD powder question...

    I understood how the FAS-DPD test woked, but I never looked into the actual chemistry behind it. Now that I have, I have a question. The titrating agent uses an iron reducing compound to reverse the reaction of the DPD poweder with the Cl. Now, it has been years (decades actualy) since I...
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    So probably the dumbest question......

    Just a guess - hard on the eyes as well Your eyes are about 7.4 - so if your pool is 7.4 that will be most comfortable. Think of it on the extremes. A pH below 7.0 is acidic. Pouring lemon juice in your eye hurts. A pH above 7.0 is basic. Getting lye in your eye really really really hurts...
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    OK, REALLY - you're adding Bleach on a DAILY basis ?

    The stuff I get is not in the "pool section" - which consists of about 4' of shelf space in the outdoor garden section right next to the pond building supplies. The bleach I get is in the cleaning supply aisle, inside. It appears to be pretty fresh stock. We must have a lot of BBB type people...
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    OK, REALLY - you're adding Bleach on a DAILY basis ?

    To give you an idea of my usage. In my 17,000 gal ABG pool, I use about 40 oz of 6% bleach per day. My pool is in the full sun from sun-up until about 6:30 - 7:00 PM every day. My CYA is about 45 PPM Some days all 5 of us are in the pool for 4 hours, other days we don't go in at all. I use...
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    OK, just re-tested - question re: CYA "tube" test

    That makes no sense. The less CYA you have in your water, the less turbidity the reagent will create, meaning you need to put more in the sight glass to obscure the dot. If the dot is totaly invisable at 60, then that is where you stop adding liquid. The 40 line is ABOVE the 60 line. Also, it...
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    Gone for a week and my pool is a mess! Help!

    Something is up with your CYA test. CYA only goes down if you change out water. For it to go from your original reading to 0 would require empltying the pool half way and refilling it dozens of times. Get your pH straight, and then get a good CYA measurement, and go from there. -dave