Hello from Fort Wayne, IN. Just bought a house with a 32X15 Roman style in ground pool 7' at deep and 3' at shallow. 18,000 gallons according to an online pool calculator I used. It's an old concrete one built in the mid 50's. Know very little about pools so I have come here to find out. All I know is that it is BAD! Anyhow; I hope to learn a lot here because I am going to need the help!