Can someone ID these dinos?

[Koen Vervaeke]

See YouTube video: 100x light microscope

 

[Lasse]

@taricha

Sincerely Lasse

 

[vetteguy53081]

Can’t see pics
Before treatment, check your phosphate and nitrate to assure levels aren’t elevated
Blow loose with a turkey baster. It will capture and clean more surface area. Here is full program:
Prepare by starting with a water change and blow this stuff loose with a turkey baster and siphon up loose particles.
Turn lights off (at least white and run blue at 10-15%) for 5 days and at night dose 1ml of hydrogen peroxide per 10 gallons for all 5 nights. If you dont have light dependent coral- turn all lights off.
During the day dose 1ml of liquid bacteria (such as bacter 7) per 10 gallons.
Clean filters daily and DO NOT FEED CORAL FOODS OR ADD NOPOX as it is food for dinos.
Day 5,, you can start with blue lights - ramping up and work your white lights up slowly

 

[theocorals537]

what are nitrate levels ? high nitrates will cause this , but also when nitrates bottom out to zero i notice weird dinos forming on the glass overnight

 

[Koen Vervaeke]

See YouTube video: 100x light microscope

I took a sample from the braun stuff on the sand bed and, when I put it under the microscope, was surprised to see crawlers that look like dinoflagellates (I had expected diatoms). The braun deposit on the sand bed is "dusty" and not "slimy" as I would have expected for text book dinos outbreaks. Perhaps not all dinos produce mucus?

Also, in the video, the organisms are flagellated and move mostly straight ahead, and don't tumble or turn all that much, so I guess that may be a useful criteria to narrow down the type of dinos?

3 months old tank. 5 ppm NO3, undetectable phosphate.

 

[taricha]

If it is a dino, it would likely be small-cell amphidinium.
I'm not 100% convinced based on that one vid clip though.

check this document for pics and vids as comparison.
https://www.reef2reef.com/threads/dinoflagellate-identification-guide.671466/

 

[Koen Vervaeke]

If it is a dino, it would likely be small-cell amphidinium.
I'm not 100% convinced based on that one vid clip though.

check this document for pics and vids as comparison.
https://www.reef2reef.com/threads/dinoflagellate-identification-guide.671466/

Great resource you posted there, thanks! Because of the absence of mucus or strands, and their movement, it looks indeed like
Amphidinium. Also, none of the snails that sail the sand (strombus, throchus, and cerithium) seems to be affected, possibly indicating that it's not poisonous. Finally, the outbreak happened even though I have a strong UV filter 24/7. This seems to fit with the characteristics in your document.