POR-15 tank cleaner and others like it are simply phosphoric acid. Muratic acid is more dangerous but a lot cheaper. If you use muratic acid dump a few gallons of soda water in to kill the acid before you dump it out. You'll then need to use a tank coating like Redkote or Kreem on the inside or your tank will rust. If your sending unit works use it. Clean the rust the best you can before you put it back in.


Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.