fishgirl53 Posted January 15, 2016 Report Share Posted January 15, 2016 Hi I have been experimenting with food coloring by putting the black color in my cemix mortar to give it a darker look for my rock background it works great the question is is it safe for fish Im guessing it is seen as it is safe for humans but just want to make sure Quote Link to comment Share on other sites More sharing options...
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