Dino ID

[Richard Terrell]

Hi All!
I posted this in a general forum before I found the Nuisance Algae forum. Mods feel free to delete the general post. I have what I'm pretty sure is a dino outbreak in a client's tank. I let the nitrates and phosphates get to 0 for too long and well...Anyway, I just wanted to see if I can get a consensus on the ID. Pretty sure they're Ostreopsis.
Thanks in advance!
Rich

 

[Reefing Madness]

 

[Richard Terrell]

Not sure if my pictures are too bad but can anyone help me ID, please? @taricha ?

 

[35ppt]

Porocentrum I believe. I don't see the sesame seed shape of osteropsis, I see an oval shape with no beak so I suspect porocentrum.

 

[taricha]

got a video? (I'm leaning prorocentrum too.)

 

[Richard Terrell]

Thanks! Took another sample last night and rushed home and put it on the scope. Nothing was moving for some reason in this sample or the original. But here is video (again, sorry for the crappy shots. My scope/phone combo isn't good for this stuff). Magnification is 10X on eyepiece and 10x objective (so 100x?). Most of the dinos are on the sand, but they do occur on the rock. Some snail loss but there are still snails and urchins crawling around. They don't seem to be bothering the corals much, if at all.

 

[taricha]

I'm a little more confident in prorocentrum after last round of pics.

 

[Richard Terrell]

Thanks @taricha ! The tank is SLOWLY coming around with nitrate and phosphate dosing (mostly P), some mechanical removal via siphoning thru filter sock, and I dropped most of the red & blue wavelengths out of the lighting. I am seeing more cyano and GHA but hoping we can manage those more readily.