These little things are growing in spots on my rocks. They look like miniature zoos or yellow polyps. You can see a snail (cant remember the name its the kind that extends a thread in the water) in the middle to get a bearing on size. Should I worry about this spreading?
<a href=showthread.php?s=&postid=12605706#post12605706 target=_blank>Originally posted</a> by Aquabucket Colonial hydroids. Prolific pests that pack a potent sting. Remove with tweezers while siphoning.
<a href=showthread.php?s=&postid=12605825#post12605825 target=_blank>Originally posted</a> by bohlke I am assuming I use the siphon to prevent it from floating away in the water and re-populating?
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