I'm asking this for my neighbor....

They have an aboveground pool with a sand filter...unsure of size but if needed I'll get it from them. They have an automatic pool cleaner - Polaris 65 - From what they say it seems whenever the Polaris is running they lose water...about 2" per day. They thought they had a leak in the liner so they searched for holes and nothing...they can't figure out why/where it is leaking. They didn't use the Polaris for a few days and noticed it wasn't leaking but now they have put the Polaris back in - its leaking again...

Any ideas????? I don't see why the Polaris would make a difference seeing that it plugs directly into the skimmer, it doesn't make sense to me.....

Any help would be greatly appreciated!!

Thanks!