Hello all, i recently (Yesterday actually) Put live rock in my tank and i got like 2.5 lbs and will add more later on as directed by PETCO. I have a 10 gal btw. with 2 damsels i added yesterday. My friend has a Nice rainbow kind of colored real live rock... mines just plain and boring just like a normal rock. How come mine isnt all colorful?? And I have Small purple raised/elevated dots on the rock what is this?? Will it grow?