Ben591
Ben
@Ben591 · 1 year ago

Ok team, what is this algae and how do I treat it best?

5
💬 6

Comments

Sign in to leave a comment

User Avatar @MaxB. 1y
comment image

I can’t tell too well because of how blue it is, but it’s really Looking like dinoflagellates. Dino’s are usually caused by low phosphate or nitrate, so test those. Best idea is to ID what type it is, either by microscope or online resources, just so you know the best steps to take for that specific dinoflagellate type. I used a uv sterilizer and that was the only thing that worked for me, but it only worked since I had the kind that goes into the water column at night. So to conclude: Test your water Find what type it is and Cure accordingly -attached is a picture of the Dino’s I fought, the small cell amphidinium, for reference. Best of luck!

User Avatar @Ben591 1y

Hi Mate, thanks for the detailed reply. If you look at the video again, there is a strand of the algae flapping around on the plate coral. I was thinking it was brown hair algae but I think you’re correct! Appreciate the help. My phosphate is forever low. I’m doing it but it keeps dropping to zero! I was worried the phosphate was feeding it as it was hair algae! Any suggestions on maintaining phosphate? Thank you 🙏

User Avatar @MaxB. 1y

Yeah to keep phosphate steady you can Feed more and a consistent amount Test regularly to find that key spot. You could also do less water changes or add bottled phosphate like neophos but id recommend you don’t do that, the Dino’s need to be manually removed (basically nothing eats them) and I’d steer clear from chemical treatment, it was too easy to do incorrect dosing. For feeding increase, I’d recommend something like an algea wafer, as the inverts will likely not find much algea in the tank, only Dino’s. In the absence of algea, Dino’s thrive. Best of luck and if you need more info feel free to ask

User Avatar @Ben591 1y

Thanks again! Have upped the temp, keep vacuuming them through a filter sock and putting the water back in! Have reduced lighting significantly and dosed pods and silica! Hopefully they subside soon!

User Avatar @MaxB. 1y

Fantastic! Outside of silica, I did everything your doing when I battled them, I know that it made a difference. I’m sure you’ll win against them in time

User Avatar @Gregrock68 1y

Test phos and nitrates. Get them corrected, then you will more than likely need to add a uv sterilizer to beat them.

Sign in to join the conversation.

Download the ReefBay App
[email protected]
|
©ReefBay 2026

Join The Community

Create an account to contribute to the community

Or continue with
Sign in with Apple
Or continue with
Sign in with Apple

Prefer our mobile app?

QR Code

Scan to download the app

Download ReefBay

Scan the QR code with your phone to download the app

Download ReefBay QR Code

Available on iOS and Android