Before I begin, I want to caveat that I am very new to pool care and maintenance.
We have lived in our house for about a year and a half, the in-ground pool was installed by the previous owner and is about 9 years old. The pool plumbing area has two return lines, one drain line for the two drains in the bottom of the pool and the skimmer basket line. We also have a chlorinator and ionizer installed.
Around May of 2015 we had some contractors come in and sod and land scape our back yard. During this process they had removed a white PVC pipe protruding out from from the side of the pool near the skimmer basket, which I now presume to be the overflow line. At around this same time in Jun of 2015 I noticed my water level dropping in my pool. At first I thought it was due to the heat of the summer, but after doing the bucket test I realized I had a leak. My water bill used to be around $80 a month, and ever since Jun 2015 my water bill has jumped to $120 a month and remained there ever since. I have to fill up my pool about 2 times per week to keep the water level. I have a hunch that my leak has something to do with the overflow line, but I have no idea how that line could be causing a leak. Maybe I am way off. If anyone has any idea what could be causing my pool leak I would greatly appreciate your advice. Thank you very much,