When I filled up my pool, using city water, I had lots of sand in my water and the vacuum I currently have will not work to pick it up because the sand is so fine. Would like suggestions for a new vacuum without spending a lot of money. I have an Intex Ultra 18' x 48". I still have the original pump that came with it which I also need to upgrade but can only do one thing at a time, spent a lot of money getting the ground leveled. Thanks!