So my tank has started to develop these very deep red/maroon patches on the rockwork.
I did think it was Cyano
, until I did some googling and found that it didn't look or act like Cyano
in any way.
I tried to turkey-baste it off, nothing happened.
Jabbed at it with a pair of tweezers, nothing happened.
Scrubbed it with a hard toothbrush, yet again, nothing.
So now I'm wondering if it's a calcareous algae.
My lights are off at the mo so this is a pic I found online of an identical happening: http://www.thereeftank.com/gallery/f...7_original.jpg
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