It doesn't brush off easily. It's the reef rock that's pink all the way through. The bottom side is still pink so it must be the light. I dose vodka so nutrients are very low so what's feeding it, whatever IT is? It's been this way for 9 months, not getting any better. Some of the smaller pieces I've flipped over and within a couple weeks the pink is black again. It's so ugly, never had this problem with real live rock but can't buy that anymore so I'm at a loss. I've been in this hobby 21 years and this is making me rethink staying in because the rock is so ugly. Spent 100's of dollars for black rock!
Janna
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