George Patterson wrote:
If the water is filthy and the skimmer is one of the high-efficiency
models, you'll see this sort of thing. That's not normal.

Mine always looks like that, although it moves like a glacier. For some
reason, my foam refuses to condense, so after it forms, it will give the
illusion of a slow motion boiling over mass of foam.

Without an anti-foaming agent, the will occupy every space available and
then foam out of every orifice that it can find. I haven't heard of
this happening to anybody else.

--Kurt