Possibly Dino's and diatoms?

[sublime250]

https://goo.gl/photos/gVefhVtq7skiQBvG6

Any clue?

Getting this algae that's quite tenacious , would like to get rid of it

 

[Reefing Madness]

Doesn't look like Dinos or diatoms, but I don't what exactly what it is.

 

[sublime250]

Square dude looks like a diatom to me