Gunite (concrete used in pool construction) in conjunction with the steel is what gives your pool its form and strength.  There are two distinct types used in building pools, wet and dry.  Although opinions may vary among pool builders, we have used both types successfully.  We have found that the strength of either type of gunite is in direct proportion to mix richness and application.  Classic Reflections guarantees a minimum strength of 3000 p.s.i. and a limited lifetime warranty on the pool shell.