water tank liner leak

[terracore]

The first thing you need to do is secure your liner. Ours is secured with a length of cable attached to a turnbuckle, they sell them in Home Depot in the same aisle as the ropes and stuff, as you turn the screws it tightens the cable, they are also used on cable rails and barbed wire fences (thanks MarkP). That will stop your liner from sinking and further tearing. As far as the current rips go, our old neighbor used to fix rips in his above ground pool with duct tape. I didn't ask how he made it adhere under water, but upon briefly pondering the question I'm guessing he probably drained the pool to where the tear was and taped it dry.

Good luck and please let us know what you come up with.

ETA: Turnbuckle (thanks MarkP)