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Old 01-18-2019, 07:51 PM
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Anyone know what this is growing on my rocks? It’s hard and securely attached to the rock.

At first I was thinking red bubble algae but def not sure.

Hope this picture helps.




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Old 01-18-2019, 10:59 PM
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could be coralline algae. I know some types can grow out from a rock and usually grows into formations. can you chisel off a piece?
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Old 01-19-2019, 08:43 AM
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Thanks. That’s what I’m hoping it is. It’s definitely not a bubble like structure. And it doesn’t fully match bubble algae pics online.

The growth is flat shaped pieces rather than round.
When my nutrients had gone out of control I think the growth disappeared but now that my tank stabilized they’ve returned.

I was able to break off a piece. I’ll take another pic with more white light.


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