+Todd Council Posted June 9, 2017 Share Posted June 9, 2017 I found these under the rocks in my holding tank today when I had to remove all the rocK to catch a Roayal Gramma that I was moving to the DT. I have read that chicken liver sponge can take over and foul a tank, but this seems really thin and not like the pictures I see on the interwebs. You guys had stuff like this? Leave it or bleach the rocks? This is what it looks like underwater through the glass Same colony out of the water, Interesting surface texture. More stuff on another rock out of the water. Quote Link to comment Share on other sites More sharing options...
Timfish Posted June 10, 2017 Share Posted June 10, 2017 I have that in most if not all of my tanks and even in the ones running a couple decades they haven't been a problem and only stay in the dark. Quote Link to comment Share on other sites More sharing options...
+Todd Council Posted June 10, 2017 Author Share Posted June 10, 2017 Thanks Tim. The rock is back in the holding tank, black sponge and all. Quote Link to comment Share on other sites More sharing options...
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