Originally Posted by reyma10
Are they good or bad for tank?
Beneficial filter feeders. They will grow and spread and its likely you'll see more than one color of them in your tanks lifetime.
29g Mixed Reef, 150w 14k Phoenix MH w/ Moonlights, Reef Octopus BH1000 HOB Skimmer, Ecotech Vortech MP10es, ReefKeeper Lite (Plus), PH Probe, Temp Probe, ATO, Carbon/GFO Reactor.