I want to build an above ground pool so that it's the same height as my side porch (5' above ground). I want to spray gunite or shotcrete but I'm a little confused about the actual construction method. I've had some people tell me they would construct it with concrete blocks, while others say they would put up concrete forms and pour the walls. Has anyone done this or have suggestions on how THEY would do it?

Pool would be 16' x 30' with 3' shallow and 6' deep end.

thanks.