Black Coraline?

sirclintler

New member
Is there such a thing, or something else? I was going to post a pic but decided not to because it looks exactly like coraline except its black, It is incrusting and I can not scrape it off and it bleaches just like the red coraline.
 
I'm not sure if there is such a thing as black coralline algae, but sponges do come in black. Lobophora algae can take on a black appearance too sometimes.

Definitely post that picture if you can.
 
I had stuff like this in my new tank not that long after the cycle completed.
It did not last too long and I managed to blow it off with a turkey baster quite easily.
How long has your tank been running?
 
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