Re: Integral Tank Cleaning With Ammonia

[mr-asa]

At the concentration you can get in the supermarket, you would have to leave it in there for months and months for damage to the metal.
Now, just a little can damage decals, and anything used to seal the tank, but that’s a separate issue.

Try leaving it in for 24 hours, then drain and inspect.
I toss in $0.25 of pennies or so and try to shake it and roll the container around