I’m going to be replacing my pool liner and want to add internal steps . I plan on using concrete for the steps and am relatively comfortable with that part. My biggest concern is how best to attach liner to steps, whether to put foam over the steps and similar details. Also, my pools bottom is currently either sand or something similar and I would like to upgrade to something that won’t get foot marks. My research leads me to a concrete bottom , but I’m still not sure plus I am not sure about what “concrete” is best , component wise.