I had a new liner put in last year. Everything went smooth last year. This year, I have been battling sand particals everytime I run my pump. I thought it was the catridge, but I took that out and ran the pump without it. Low and behold, sand particals! I know there has to be a hole somewhere in the liner. The water level seems to be affected a little. But nothing significant. There is some gathering of the liner at one end of the pool, which is 15x30 AG. My question is this. How can I find the hole? If there is one. I have tried to find the hole, but to no avail. Thanks