Pool: 15k gal, Pebble on Plaster, 2.25HP Whisper Flo, 60sqft Pentair DE(running cellulose fiber), Polaris 380, Big Rubber Ducky
Spa: 470 gal, Jacuzzi J-480, xHP Pump 1, xHP Pump 2, ??? pretty cool stereo, ozone, Smaller Rubber Ducky
I got a B.S. in Biochemistry and Molecular Cell Biology, worked as a scientist for years. TFP is the best resource I've found on the internet.