A neighbor of mine has one of those above-ground swimming pools that is

basically just a huge bag of chlorinated water. It has a slow leak in the

floor somewhere. Her question to me: How do we find the leak? It could be

something really small; and the fabric of her pool has that speckled design

that makes blemishes hard to spot. I suggested dropping some dye into the

pool and hoping it’s pulled towards the leak, but this doesn’t actually seem

very likely, the pulling being so slow that the dye would all have

dissipated before the direction of flow became clear. So… how does she

find the leak? Any suggestions to [email protected], please.