My customer in Udon had a Fiberglass swimming pool that was delivered of one of the vel known companies in Thailand. Everything went wrong with this. Worst was it with the quality and the service. After 18 month, he decided to change to a tiled concrete swimming pool. We got the job. The swimming pool got replaced. Here are some pictures from this. https://www.sakon-swimmingpool.com/replacing-a-fiberglass-swimming-pool.