AboutCraig Expertise Residential Pool Systems Only: Filters (DE, Sand and Cartridge), Pumps, Polaris and Letro Pool Cleaners, Plumbing, Algae Removal, Leak detection, Chemical balancing, Renovation, Seasonal opening/closing issues, Custom safety cover installations. I do NOT provide advice on vinyl pool construction or above groud pools.
Experience Owned and operated swimming pool renovation and maintenance company for 10 years before selling it. Currently act as an independent consultant. Education/Credentials: Bachelor of Science degree New York University, Former member of the National Spa and Pool Institute (NSPI).
Question My 20000 gallon inground marcite pool of 18 years has started losing "patches" of marcite, and now you can see the concrete in those patches. They are on all surfaces of the pool, but mainly on the bottom, both shallow and deep. What is causing these and is it normal for a pool of this age. The chemicals have been very stable for many years, checked by me and the pool stores. Thank you for any advice.
Answer Mark:
Proper water chemistry (chlorine, ph, alkalinity, water hardness and cyanuric acid readings) will help prolong the life of plaster but it will not make it last forever. You have certainly gotten your monies worth.
