I used muriatic acid to clean rusty parts and it worked great. I rinsed them with a baking soda solution afterwards. I see no reason why it would not work in a tank. Just beware the fumes! 

Chris. 

Wysłane z iPhone'a

Dnia 29.01.2016 o godz. 14:58 Rick Cooper <rickdcooper@GMAIL.COM> napisał(a):

> 
> 
> I read somewhere on the samba that some guy had drained the tank and
> cleaned it with muriatic acid.  Anyone tried this?
> 
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