Originally Posted by skipgundlach
...Muriatic acid will get rid of it, but Barnacle Buster is much more environmentally friendly....
Explain. Barnacle Buster contains phosphate (IIRC), but HCl contains only chloride.
They different in corrosiveness to metals. HCl will be more damaging. HCl requires more care to handle, and I would definitely prefer to use BB. But HCl is quite non-toxic, since it leaves only salt
after it reacts with lime (In fact, in solution, it exists neither as HCl or NaCl, only as ions). Stomach acid is primarily HCl.