It is taboo for a fiberglass pool builder to discuss flaoting fiberglass pools but its time to have an honest discussion about floating pools and what causes it. It's time to dispell the myths and get to the cold hard facts. SO, DO FIBERGLASS POOLS FLOAT Then answer is, YES. Fiberglass Pools can 100% float. However, believe it or not concrete pools and vinyl pools float as well. Floating is not exclusive to any type of pool or anything that is in the ground for that matter.