yuppers straight vinager and leave it for 24 hrs or you can add PH down. to the fresh water to soak that will take alot of stuff off due to the down in PH it will down the PH down to 5.5 and then it will flake off. JUST SAYIN 
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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