Dinos?

[Paul24]

The video shows a bunch of small bacteria or something moving and the photos show bigger cells I suspect to be dinos for sure. Any idea what I have?

More context:
Dose phosphates since it keeps bottoming out while nitrates are consumed alowly. Sand is the only affected currently. Rocks are live and sand is too. Had GHA a few weeks ago that was taken care of by manual removal and cuc. Tank is 2 months old.

 

[Gumbies R Us]

Parameters of your tank?
Can we see a photo of your tank?

 

[Paul24]

Parameters of your tank?
Can we see a photo of your tank?

Parameters are:

Cal 410
Mag 1320
Alk 8.4
Nitrates 6
Phos 0 (despite dosing)
Salinity 34.6
Temp 77