Hi all, new in this group. Just got my fiberglass pool installed and backfilled. After having to pull it out once to rebalance it due to a sinking corner it looks great and is level. When I walk on the large shallow bench area though, and maybe the last 4 feet on the bottom of the shallow end I can feel the fiberglass vibrate and hear a more hollow sound than in other places. I am hoping there is a way it will settle or whether it should be strong enough to handle the small amount of flex and it does. The pool is a 30'x15' Liesure pool riviera. I love the way it looks just want it installed right to prevent problems in the future. if anyone had to deal with these issues or has some input Id appreciate it. Thanks.