Our pool is 8 years old, and we have some areas of grout in the spa dam wall (around the tiles) that is worn and flaking out. How do we fix this? Can you simply do an acid wash and then replace the damaged grout? Or, do you have to first remove all of the old grout, then replace with new grout? Will new grout adhere to the existing grout? For how long?
It is not real bad, but needs attention before winter. Any suggestions?