Why is the hose from the pump to the skimmer collapsing?
Any obstruction in the hose or skimmer can cause a hose to collapse. The hose may be old and require replacement. Check to ensure that the pump is not oversized for the hose and system. With new hoses collapsing, the pump may be too large or the hose diameter too small. If it collapsed once, chances are it will collapse again.
