Do I have Dinos?

[drcole]

I'm confident yes, but know there are many different methods of treatment based on which type. What do I have here?

 

[Ding2daDong]

I'm gonna go out on a limb here and say if you grab any bit of reef aquarium saltwater there is a chance you could see dinoflagellates, even if you don't see it visibly in the aquarium. I don't necessarily see it on this picture you posted from a microscope.

 

[drcole]

I'm gonna go out on a limb here and say if you grab any bit of reef aquarium saltwater there is a chance you could see dinoflagellates, even if you don't see it visibly in the aquarium. I don't necessarily see it on this picture you posted from a microscope.

Here's where the sample was obtained from.

 

[ScottB]

I'm confident yes, but know there are many different methods of treatment based on which type. What do I have here?

I can't make it out from that photo. Here is an ID guide that should help if you can get some more images or videos that show motion. Your tank shot sure looks like a full bloom to me. Got any NO3 or PO4?

Four out of 5 typical species will be impacted by the use of UV. Large cell amphids not so much.