Just found this site, whish I had found it months ago. Finally after many months of trials and trouble, our pool is starting to enter the last phases of build. It's a 22x41 vinyl liner mountain pond. We've had water in the pool for weeks but only got equipment turned on about 4 days ago. Yesterday, the builder grouted the bullnose coping brick. While doing this, they simply washed the grout sponges directly in the pool. Is this normal, they assured me it was. However, they actually had my polaris running while and since this was going on. The polaris wheels are now hopelessly clogged with grout. I am no pool expert, but this just seemed odd to take a pool that was almost crystal clear and do this. Is there any danger to my pumps/filter etc?