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  1. V

    High chloramines w/a new tub and fresh fills

    I've owned a pool previously (at a different house, on city water), and am familiar with water chemistry - but I have a problem that is stumping me. Last week, I had a new AquaRest AR-400 premium (ozone) tub delivered. After I filled it the first time, I added about 16ppm of dichlor and tested...
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    Secondary determinants in FC lost to sunlight

    I'm curious what factors impact the amount of free chlorine that's lost to sunlight. Obviously, CYA levels and available sunlight (UVA/UVB radiation?) are primary determinants. However, given any fixed amount of CYA and sunlight, will your free chlorine lost to sunlight be a function of total...
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    New pool, PH jumps, proper CH level?

    I'm in a similar situation. My new pool was built three weeks ago, and my ph can jump from 7.6 to 8.0 overnight. My CH is around 200 presently... and I've kept it there because my CSI would be much higher if my CH was around 300 during one of these jumps. Is my logic faulty? Even if my ph...
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    Downsides of SWGs - fact or fiction?

    My pool construction was completed earlier this month... and I'm gradually learning more and more about the technology, chemicals, and process needed to properly maintain it. Due to rising CYA with continued usage, I've switched from using trichlor pucks to liquid chlorine. However, I usually...
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    Testing ph using the TF100

    I'm one of those individuals who has difficulty with some of the color comparison tests. With the ph test, I can't tell one color from the other with direct (or front) lighting. However, if I hold the test up a light source with a consistent background, then I'm better able to make the...
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    Is this black algae?

    My newly constructed pool was filled on July 10th. Almost immediately (two days later) I saw noticed black spots on the plaster. I didn't think anything of it at the time, as the pool was new and water was just added. It may be my imagination, but it appears the number of black spots have...
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    FC goal when using an Ozonator

    My newly constructed pool was filled on Friday the 10th. The pool construction guy initially set up all the equipment, added CYA, and put two 3" tabs of trichlor in the automatic chlorinator. I was told that due to the QuikPure 3 25k gallon ozonator, my free chlorine levels would always be low...
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