I want to try acan frag. Some things i read say they are easy some say no is there a certain one known to be more hardy.i have a red mushroom and 2 zoa frags been doing fine since i added them last week .i have a green monti cap it bleached the first 2days and looks really good now the small polyps all over now and has good color.the tank is 34 days old do you think i can add a frag or should i get something different i want to get some colorfull stuff in