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  1. CMH-CVG

    Poolmath calculation of chemical cost per use

    While I can enter in the app the total chemical cost of a purchase and get a summary report, I don’t think the cost is linked to the chemical additions after testing. This would provide an actual cost based on use. Rather than entering the total purchase cost, eg Muriatic acid $12 x 7 gal =84...
  2. CMH-CVG

    Brass hydrostatic relief valve 1963 chlorine pool replacement?

    While resurfacing the pool, following sandblasting a number of brass fittings became visible. The deep end drain grate, a hydrostatic relief valve, and an attachment for buoys the separate the deep end are all made of brass. The hydrostatic relief valve lost its spring (user mistake during...
  3. CMH-CVG

    1960's gunite pool resurfacing - seeking SUMP valve advice, pool light and other questions

    The 1963 gunite pool (35,000 gal) has been painted white over blue over white by prior owners and chunks of the paint are now peeling off, exposing the gunite (?) underneath, caused by the dolphin pool cleaner and poor painting. The backwash shows a lot of white paint residue, so in the...
  4. CMH-CVG

    Update to a successful solution to a threaded pool ladder bracket for a 1960's gunite pool

    The 1963 gunite pool (35,000 gallons) in the house that I purchased 3 yrs ago, used to have a stainless steel pool ladder anchored by 2inch threaded round brackets. Thanks to the guidance from 1poolman1 to look into pipe threads, I was finally able to find a suitable thread coupling that...
  5. CMH-CVG

    Magic eraser removed soft yellow coating exposed during closing

    Positive magic eraser experience to remove soft yellow stain visible on walls after dropping the water level during closing. Background My pool remained crystal clean (following pool math) after opening (May’23) until 1 week before closing (Oct 12,23) when falling leaves, dirt and debris from...
  6. CMH-CVG

    FC and pH test sensitivity as samples measured 8hrs apart had different values

    Two Taylor 2006C samples taken 8hrs apart showed increase in FC and pH. The night before it rained/stormed all night. I cleared debris and baskets and tested the water. The FC 0.8 and pH 7.0 were low. I was about to add both Pool bleach (2 gal) and increase the pH, however, I waited and did...
  7. CMH-CVG

    1969 Gunite single pool light replacement - A case of leave well enough alone to avoid potential leaks?

    Is this a case of leave well enough alone....dont touch the light to avoid leaks? Question: Can a 1969 built gunite pool with a light (in disrepair) in the deep end be replaced without draining because the light niche constructions are similar to current pools that allow replacement under water...
  8. CMH-CVG

    1969 gunite pool ladder brackets are threaded, looking for how to attach a new ladder to the deep end

    Been searching for a way to use the existing threaded ladder brackets in a gunite pool built in 1969 in Ohio/USA to install a new ladder. There used to be a ladder based on photos prior owners have sent me, but they don't have memory or knowledge on why the ladder is missing. I want to avoid...
  9. CMH-CVG

    Slow upward trend for Phosphate and TDS

    Since opening in May, the chlorine pool has remained clear and mostly a TFP thanks to the advice from this group, use of Taylor K-2006C and poolmath. The chemical requirements have been mostly +2gal Liquid Chlorine about every week, with pH/Alkalinity/Hardness moving in and out of range when it...
  10. CMH-CVG

    Cloudy Blue water 1 week after opening

    First time trying to balance the pool chemistry myself following the Pool company opening the pool last week. Currently the pool is cloudy blue. Pool details: in ground 30,000 gallons, Plaster from 1963 painted white by prior owner (dolphin is slowing removing the paint....), Chlorine, Sand...