I've been asked to quote to clean some tanks. I've been told its just a rinse down/flush out but have never done any tanks before. The company that normally does it uses a "Fury Ball" apparently. Like a spinning ball nozzle that they just lower into the tank slowly.
I have done some other cleaning work for the company who own the tanks, and they want a price from me so they can just have one company doing all the cleaning throughout the site.
Has anyone ever done any tank cleaning? What is the best rotating head to use? The only access to the tank is through a 12"(ish) hole in the top.
Cheers