Recent content by Aggie_ChE

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    Painting fiberglass baptistry

    Thanks again!!!
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    Painting fiberglass baptistry

    Two more question, RDspaguy. 1) What acrylic clear coat do you recommend using to seal the cracks and surface of the baptistry? 2) Do you have any experience with Acid Magic, which is marketed as a buffered muriatic acid that is much safer for human skin and has 90% less acid fumes while...
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    Painting fiberglass baptistry

    Thanks much for sharing your expertise, RDspaguy!
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    Painting fiberglass baptistry

    50/50 muriatic acid sounds like some pretty strong stuff. When I was a dumb college freshman at Texas A&M, in a brand new building for science labs, I was mixing sulfuric acid into water as I was walking. Clumsily I spilled the acid on me, eating the bottom half of my shirt off, burning holes...
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    Painting fiberglass baptistry

    RDspaguy, thanks for the quick reply. You seem like EXACTLY the resource I need. The reason I have been adding the CYA is because of a recommendation that "You will want some CYA in the water, not for protection from the sun, but to buffer the harshness of the chlorine." from this 2016 thread...
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    Painting fiberglass baptistry

    Because I am a pool owner (and a retired guy), I am in charge of my church's baptistry. For several years we keep water all the time in the baptistry and warm it up every Saturday in case someone wants to be baptised on Sunday. The baptistry is fiberglass, about 400 gallons. I maintain the...
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    Optimum CYA level

    Thanks for the suggestion on the signature. I just updated. My pool is about 16,000 gallons in direct sun all day. I have thought about it but have never run a free chlorine demand test. I guess I should do the test. You sure use less chlorine than I do.
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    Optimum CYA level

    Your sun and mine are probably similar. Northeast Texas is hot and humid, but not as humid as Houston. I use the CYA granules. I have the larger 8 gallon Liquidator which give me about a week's worth of bleach for vacations. It seems like I need about a gallon of chlorine per day which seems...
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    Optimum CYA level

    We live in Texas and have an outdoor 16,000 gallon vinyl lined pool. What is the optimal CYA concentration to shoot for? Typically I aim for 40 ppm CYA just because 40 is in the middle of the 30-50 ppm target range. This seems like a too-simple reason to target 40 ppm; hence my question. Maybe...
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    Baptistery Care Suggestions????

    You are right about the baking soda. My tap water TA tested at 50 this morning, so I would not have needed to add nearly as much. I will remember that next time. THANKS!! - - - Updated - - - A filter could be added, but being in a climate-controlled building, it seems like there is very...
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    Baptistery Care Suggestions????

    We are only planning to drain the baptistery every 6 weeks or so.
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    Baptistery Care Suggestions????

    Thanks for the quick replies. I should have checked earlier for the suggestions. The intent is to keep the baptistery ready at all times, so the baptistery will have to be filled all the time. Unfortunately there is no filter. There is a water fill line, drain line, and circulation pump with...
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    Baptistery Care Suggestions????

    Hi. I have just been asked to take responsibility for our church baptistery. The baptistery is a 400 gallon fiberglass structure with an electric heater and small circulation pump. The baptistery is probably 20-to-40 years old. The goal is to keep the baptistery full and somewhat warm 24/7...