No matter how hard I try to clean my pool there is a dirty mark all around the sides. I have heard that you can get a border to cover up the marks. Anyone know where this can be purchased. Ta

There are vynl tile look a like strips that you can glue to your existing liner but these will still have the dirty mark but it will not be as obvious.
Ask your local pool company, they mav akso have a cleaner or just make sure that everyone washes off any suntan lotion before using the pool.
That is the main cause of the problem.

Thanks will try the local pool company. Trying to get friends and family to wash of sun cream before swimming is easier said than done. You would need eyes in the back of your head. Also we are not always there.