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				 DIY Live rock questions 
 Lots of videos and advice on You Tube so my questions are hopefully simple.
 Instructions tell me to use portland cement but I've seen a few people say any cement will do... thoughts?
 
 Water softening salt is used in a lot of the recipes so I'm wondering if anyone has a local source for this and finally the oyster shell, where will I find it?  I was thinking otter co op but haven't had the time to call them yet.
 
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