I have been hoping to have a smallish pool installed in my back yard. I have researched and really wanted fiberglass (in Georgia) but no one around will do that. They only do vinyl liners. One company that is highly recommended uses cinder style block but made out of a kind of resin, but fills the holes with rebar and cements. The bottom is a mix of sand and vermiculite, but it is a vinyl liner. They don't use steel walls because they're big proponents of salt water systems. Has anyone ever had a pool installed with this type of wall? I'm a single grandma trying to keep my grands happy.