our in ground pool has a vinyl liner which appears to be held in place at the top by a strip of aluminium or similar. The pool surround cinsists of terracotta tiles which are cemented in place on top of this.
My problem is that in places the aluminium is pitted and corroding. Does anybody know what causes this and how to stop it? The corrosion seems to occur in random places rather than for example under joins between tiles.
The pool is covered in winter so I don't know if the corrosion is happening then or in summer.
Thanks in advance for any suggestions