Gravel/sand getting in behind liner

[mg_gti]

I have a 6-year-old vinyl liner pool. For some reason I am getting sand and gravel in between the liner and the pool walls (you can readily feel it with your hand). Seems to get worse every year. The only thing I can think of is the winter freeze/thaw (I'm in Ontario) has separated the aluminum coping the top of the pool wall and the A-gravel under the concrete deck is getting washed between the two. However everything looks fine from the outside. Anyone ever heard of this?

Thanks,
Sean

 

[Bama Rambler]

Is it a metal walled pool?
I'd think you'd be able to see it if the coping was separating from the wall.

 

[mg_gti]

Yes, it is a steel-wall/concrete bottom vinyl lined pool (Kafko to be precise). There doesn't appear to be any separation, but of course the join is hidden behind the liner. I really don't know how else so much debris could be getting in there.

I guess the pool will have to be partially drained and the liner unclipped to take a look. Is unclipping and re-clipping a 6-year-old liner feasible?

 

[Bama Rambler]

Maybe, but that's pushing it. At 6 years old I'd probably just live with it for a couple more years if it isn't too bad and deal with it when it's time for a new liner.