I hired this company to remove a stain (probably algae) from my pool. The technician was extremely nice, and he recommended we first treat the pool for copper staining. If that didn't work, he said that they could acid wash it. I asked the cost of both treatments. He said the copper treatment would be about $150, and the acid washing would be more but without specifying. I agreed to do both unconditionally. I want the job done! The treatment left a white powder precipitant on the pool floor, and this made the water appear blue and beautiful, but it required vacuuming. So I agreed to pay for vacuuming, though the price was unstated. The chemical treatment took three weeks and was a dismal failure. No improvement. The technician said the company would call me to schedule the acid wash, but I received no call. After that, the technician did not return my phone call message, but the company receptionist said that a manager would call me back. I never heard from anyone. The following week I received an inflated bill for approximately $450 for the failed chemical "treatment". Salvo never called me back to follow up with the acid wash. Bottom line is, inflated billing and very poor service. Seems like a rip off to me, but you make the call. I would never recommend this company to anyone.