Yes -- our students use steel tanks, and many of them do their pool work in a bathing suit. If they wear a weight belt, which is required for some of the skills, they are significantly overweighted, and the weight is in the wrong place. My husband, bless his heart, doesn't make his students wear weight belts (unless they need them) except for the pool day when they will do the weight belt skills. They still are often unbalanced, but it's better than it would be with the weight belts.