We got some live rock a couple of weeks ago, and it came with some hitchhiker zoas......we noticed that they have actually been spreading and this made us really happy. But today we looked at them, and there is this white, sponges looking stuff growing all around them now.....we have no idea what that is and if it is good or bad, so I thought I'd ask and see if anyone has any ideas. Looking forward to hearing from you all....thanks in advance!!!!!
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