Gail, where do you get your phosphoric acid from?

I used to use Behr Concrete Etcher & Rust Remover in the black jug but they took the phosphoric acid out of it in 2009 and their replacement Behr Concrete & Masonary Cleaner/Etcher doesn't even touch the rust. I would love to find five gallons of it for my acid tank which is down two a couple of gallons.
Denny Graham
Sandwich, IL


Denny G
Sandwich, IL