"robv60" wrote in message
oups.com...
Oh yeah, also, this may give you more experienced ponders an idea of
whats going on. All day long, all the way around the surface of the
water, the concrete walls stay wet about 2" above the water surface.
Almost looks as though the water dropped two inches really fast and the
concrete hasnt dried yet, make sense? Say for instance you dipped a
piece of cardboard into the water and the water "leeched" up into the
cardboard that was above the surface of the water. Im assuming this is
what the concrete is doing, sucking up water from the surface.

If your concrete hasn't been sealed that may be part of your problem. You need
to seal the concrete with an aquatic-safe sealant.