Hello. When our pool was initially installed the pool company installed the stools incorrectly. When one came off the manufacturer came and did repair. They couldn't get the last stool off to install correctly. At the end of last season it came off. The stools are hollow. The manufacturer will require emptying the pool. We'd like to try another solution. I read in another thread recommended to try this product. There were no updates on outcome. Does anyone know if this will work or other products that will work underwater. Thank you