24,200 gal., IG vinyl, 18' x 36' rectangular, average depth 5'. I have both the Taylor K2006c and the TF-100 test kit,1.65 HP PureLine VS Pump, Jandy SFTM22 sand filter, Raypak 406,000 btu NG heater, Pureline 60,000 gallon SWG, Intermatic P1353ME 3 circuit digital time switch, Doheny's Discovery Robot. I work night shift (NICU RN) so most of my posts will be during the night.