My pool is 15000 gallons and made of Marcite/Gunnite. It's an inground pool in Central Florida with a small upper pool which drains via waterfall feature into the main pool. Hayward ProGrid DE3620 filter. Pump is "Pentair SuperFlo VST Variable Speed Pool Pump 342002". Chlorine source = bleach with intermittent trichlor when I have to leave town.
Bought the house with the pool in 2019. Getting better at pool management/maintenance/improvement, but still learning!