Had a bad case of algae and gave the rocks 4 months in the dark. Some of the algae is commin back, but so are the Zoa's that were on the rocks. One colony has a tad of color in the center, the other colony is ghost white. Will they regain their original color? If a new algae were introduced from a diff morph, would these take on those colors or is their color pattern 'set in the DNA'?