Well the sand will have to go and the rock if you have any. If you try it with out cleaning the inverts corals, will most likey die. All the filters that have media and floss is thrown out and tanks will have to be clean out too really good ,with that being said the whole system wil ahve to get scrubbed I dont know about the silicone thou.. some copper may get into it. I can't answer that for you ...
lots of work thou
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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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