Can you ID this algae please?

[old_lady_4am]

Hello! Is this GHA or lyngbya? Maybe I’m treating the wrong algae (gha). Thank you in advance for your help!

 

[Dan_P]

Hello! Is this GHA or lyngbya? Maybe I’m treating the wrong algae (gha). Thank you in advance for your help!

Appears to be an algae. Examination under microscope would be the best way to ID.