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#1
11-19-2008, 01:01 PM
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ive always read that the issue with cement rocks was thay affect ph quite a bit for the first few months i think garf.org has a bunch of info also i think talkingreef.com did a show or 2 about it.
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but what the heck do i know 
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#2
11-19-2008, 02:22 PM
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i've used regular type 2 in all my rocks and as long as i freshwater cured them, haven't had any deposits or salinity problems. Lots of coralline growth on them now tho if that counts as a deposit :P
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