Algae/Bacteria ID

[Nathaniellund17]

Hello all, need help with identification of these spots showing up on some rocks. I thought it was cyano bacteria, but it’s only growing on some rocks. Along with that, when I blast out with a turkey baster, it doesn’t come off the rock which makes me think it’s something different.

 

[MnFish1]

It could be a type of red algae. Does it change from morning to night (i.e. seem to be gone in the AM - but present after the lights are on all day)?

 

[Nathaniellund17]

It could be a type of red algae. Does it change from morning to night (i.e. seem to be gone in the AM - but present after the lights are on all day)?

That’s a good question, I’ll have to pay attention to that, will let you know.

 

[Nathaniellund17]

That’s a good question, I’ll have to pay attention to that, will let you know.

So the red spots do not go away at night, and I can’t blast them off with a turkey baster. Not sure if anyone else has seen something like this.