Algae ID

[Michael Gentile]

I can’t seem to get rid of it, it first started on just the white rocks and now is spreading to the purple as well. My parameters are all in check and I only feed once a day for my three fish. I don’t over feed. I also cut back on feeding the coral with reefroids to reduce particles in the water. I scrap it off the rocks weekly and siphone out as much as I can but I keeps coming back stronger. It’s like a flaky brown algae, my snails dislike it as well. If the pics aren’t good enough I can take more!

 

[SurfTrack]

I cannot really tell what you are talking about specifically because of the blue light but if you are talking about a deep purple almost brown algae that can blanket over rocks and sand - its cyano algae.

But for the light brown algae I see, with the bubbles trapped in it, that is dinoflagellates.

Regardless of what you were talking about, they are harmless and will go away with time as long as you keep up water changes and maintenance. Your tank looks relatively new - the algae is present because your tank is still stabilizing. Just keep doing what you are doing and it will go away. Good luck!