“It doesn't seem to work. It says you'll notice fizzing. That doesn't happen. The black spot doesn't seem affected. I previously ordered the Pro Kleen black spot remover, not the ultimate one, and that seemed to do a better job”
“We had years of black spot and discolouration on our Indian stone patio which was impossible to remove with a pressure washer - this product was brilliant, easy to use and restored it like new.”
