Algae ID (microscope). Diatoms or cyano?

[cbarros2]

Please ID! Diatoms or Cyano?
My tank is just 1.5minth old since cylced. I had an algae bloom and very confused if its Diatoms or Cyano. So I put a sample under my son’s microscope. What do you think?
Thanks

 

[Jay Hemdal Verified Community Expert]

Welcome to Reef2Reef!

The first and second photos look like diatoms to me. The common Cyanobacteria forms long filaments that you can actually see moving slowly.

Jay

 

[cbarros2]

Welcome to Reef2Reef!

The first and second photos look like diatoms to me. The common Cyanobacteria forms long filaments that you can actually see moving slowly.

Jay

Thank! As the first photo you cam see some filaments I thought it may be cyano.

 

[Jay Hemdal Verified Community Expert]

Thank! As the first photo you cam see some filaments I thought it may be cyano.

Could be, but were they oscillating/moving?

Jay