what is this stuff?

[deepsix]

I have recently developed a purple leafy and purple bubble looking stuff in my tank. Is this an algae...good or bad? If bad, what might have caused it and how do I get rid of it? Thanks

[reefhead]

this is Cyano Bacteria

do a search for "Cyano" or "Red Slime"

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Its commonly due to a build up of nutrients.

either A you feed to much or B you do not have a means of exporting...ie.. harvesting macro algea.

[reefhead]

here is a pic of my sump which is also a fuge.

[Reefland]

As reefhead mentioned, the algae on teh top of the rock is cyano.

However I think the algae that you are referring to is in the center of the picture and the lower right hand corner. I'm not sure of the type however I had plenty of this growing in my tank and it is harmless, other than the rate it spreads. Actually, I liked it in my tank as it added some nice red coloration.

Regards,
Scott Z.