oops I should have posted this in the other thread...

but can you tell me why ropes and floats that is set back 1' from the beginning of the slope wouldnt be the ideal solution? Cheap, easy to take off, easy to store, minimal damage to pool. Already is approved by various safety codes.

I assume your child can walk around in the shallow end. If she knows to stay behind the ropes then she should stay relatively far away from the deep end.

Its like the fireplace glass, your kid makes the mistake of touching it once (ouch) and they learn to respect it and never touch it again. I think the number one safety device is the brain. IMHO... I think a solid barrier might a person a little more "casual" in their awareness of what their child is doing... I'm not implying you... but if such a device existed in general.