With kids using the pool, I'd say go at least 8ft. You can certainly tell them no diving, but did we always do what we were told when we were kids? I know I didn't....![]()
This ^^^^^. We were originally going to do a "play pool" as I am a practical guy and read all of the "80% of the time you spend in the shallow end stuff", but we have 3 boys and they have friends and to be honest, I will be the first one trying to do a double off the top of the waterfall. To me it came down to a safety issue. You can tell them no diving until you are blue in the face but as soon as you turn around guess what. That is going to be impossible to police so, to me, it just wasn't worth the risk. With that said we are building a bigger pool so we will still have a pretty decent size shallow end which did make the decision easier.
Good luck and I am sure you will enjoy whichever decision you make.