I was worried it wouldn’t be enough for a waterfall/fountain full of black stains and algae. Boy was I wrong. It stripped it down to almost new! Still have a few more passes to go
Got this yesterday and used it today, and it's a great little washer. Did my driveway, which is very large, and a side concrete driveway, which is about 400 sq ft, and this machine just knocked out both without a problem. I'm more worn out than the washer. Nice and quiet not like my old gas washer. So, try Westinghouse pressure washers I think you'll like them.