We have a fiberglass pool with attached hot tub. We have now learned our pool installer had never stoned the attached hot tub despite selling us this would be no big deal when we showed him a picture in the brochure he had in his office of what we wanted. The first year everything seemed fine. Since, the stones continue to fall off. His crew has repaired it once and within a month it was worse than before. Is there a product or technique that can prevent this? Is what we want even possible with fiberglass? If not, how do we go back now to something worth looking at? Sincerely, frustrated in Nashville TN