Black Slime Algae

[Rue]

I cleaned my 55g goldfish tank today, redecorated a bit. After several soakings in HOT water yesterday, the driftwood seemed better (less tannins)...

It's a coldwater tank and sits steady at ~65 C year round.

In that tank I have black slime algae. It scrubs off easily, but looks, well...like black slime.

Anyone else have it? Not sure what to do to get rid of it...

[Alfcea]

Sounds like cyanobacteria to me... Did you try Dave66's primer?

[Rue]

Is that the FW version of cyano? It's the same stuff I used to slip on in the summers when I was wading along lake shores...

[Algenco]

Is that the FW version of cyano? It's the same stuff I used to slip on in the summers when I was wading along lake shores...

I agree, cyano:help:

[Rue]

LOL...it's not really a problem, it's just ugly.

The red cyano in my SW tank is a problem...it will choke out my corals if it grows over them...but the FW black slime doesn't really do anything...