Unknown cell ID

[pookie]

I have whatever these are on my sandbed and they are everywhere. I already posted this on macks dinoflagellates group and was told they dont know what they are... this was taken at 250x zoom. Anybody seen or know what these or are they are toxic and possible treatment?

 

[pookie]

I have whatever these are on my sandbed and they are everywhere. I already posted this on macks dinoflagellates group and was told they dont know what they are... this was taken at 250x zoom. Anybody seen or know what these or are they are toxic and possible treatment?

Here under microscope not sure why it was posted without the video...

 

[pookie]

they seem to die and "split" open after about 15 minutes under the scope as there is no movement anymore all

 

[Gumbies R Us]

How old is the tank?

 

[pookie]

About 3 years now