I wanted to see if anyone has had any luck using a biological growth remover type product? I have two machines with severe algae deposits in the tank and filters. We had a mechanic come out and he took care of the one machine by removing the fuel tank cleaning it out, replacing all the filters, and blowing out all the lines. I was hoping to replace the fuel, replace filters, and treating the tank. I have used the power service in the past and it did not work at all. Is there something better out there?