We installed a 7,500 gallon above ground (although slightly sunken) Kayak pool in September 2019….yes, right before the pandemic. The first 1-2 years were pretty good, the last 1-2 years I continually have problems with CYA. Several trips to Leslie’s and several hundred dollars later I went to a local pool store who told me to add baking soda. My eyes were opened and no more trips to Leslie’s for us! Hoping TFP will be easy and successful this year!