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is food grade dye reef safe?
my copperband butterfly eats lots of live black worms. he eats brine (I suspect because they are dark in color, just like the black worms). I want to ween him onto mysid shrimp by dying them black. will the food grade dye harm the copperband or my future chances of a reef tank?
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"We will flog them and flog them until moral improves!"
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