Are these dinos?

[Wernerdin]

They are tiny and do not move.
I took some pictures of them under microscope:

Thanks for the help!

 

[NeptuneSpear2011]

This is what Dino's look like and these are from my tank about 6 months ago. (Pic below) Yours look more like Green Algae or Diatom spores. Mine are more pear shaped.

What common reef dinos look like under a microscope​

Here’s what we normally see:

Ostreopsis​

• Large, oval “egg” shape
• Golden-brown color
• Very visible internal structure

Amphidinium​

• Bean-shaped, asymmetrical
• Moves rapidly and erratically across the slide

Prorocentrum​

• Distinctive oval “coffee bean” shape
• Clear hinge line in the middle

Your sample:​

• Perfectly round little spheres
• No grooves, no armor plates, no egg/bean shapes
• No visible movement
• Very uniform

These traits rule out dinos.

 

[Wernerdin]

Ty for the answer,
Then, if they are not dinos, I don't know why my tank is struggling. My corals and anemones give similar simptoms when there is dino irritating them. They are not opening normally, especially the zoas.

 

[NeptuneSpear2011]

No problem. That’s why I hadn’t said get a microscope. Get a sample of the substrate that that’s brown and then you’ll be able to identify 100% what it is.