Just be sure to use "extreme" caution when using muratic acid.

Susan
"KurtG" wrote in message
news:MC1_h.20498$vD4.13408@bigfe9...
Pszemol wrote:
Advice your mom to use muriatic acid (HCl) to wash of this white residue
:-)

btw, can I use Muriatic acid on encrusted aquarium parts assuming that I
rinse well?

Soaking in vinegar works, but it does take a long time.

--Kurt