I currently have live rock in my tank and would like to get it to turn from its brown/green color (algae) to purple/pink. I have fish in my tank as well, so it's not a reef tank. I also have used copper in the past, once three or four years ago, since then I have been using carbon, chemi-pure to filter water. I know that the purple/pink color is coraline algae, so will it grow in my tank post the copper treatment with the addition of calcium additives? That's my question. Help please!