One of the smallest Magnificas you'll find! Unfortunately I don't have a microscope. After reading a ton of threads on microscopes and dinos, it seems like I'd need to invest in quite a nice one to get a good read. I was hoping to just treat it generally with NO3/PO4 to get algae to outcompete, but it hasn't worked. I weirdly dislike microscopes. I still have nightmares of chemistry class (terrible, slightly racist highschool teacher). I chose my career path almost 100% to avoid chemistry (chose the single engineering major that did not require chem). From what I've read, it seems like DinoX will work on most, if not all types of dinoflagellates. And then good levels of constant NO3/PO4 will also help keep them at bay. So that's what I was trying to do. If I'm missing something and must figure out what kind of dinos I have, then I guess I'll try to get a microscope. Just so many pieces and things just to look at it once. Seems kind of overkill. Maybe I'm just too stubborn.