ostreopsis on night

[vital]

hi guys. I have ostreo (microscope confirmed) in 120g
nothing on night and morning, hell afternoon.
switched on 36wt uv - no effect.
decided to check my watercolumn on night. it was almost midnight, got the probe from dt under microscope - nothing! not any single cell! switched light shortly on - some bubbles on the stones, some ugly string on the corals, but mainly clean. the invasion will happen tomorrow afternoon. checked some of the strings - ostreo

where are they? is ostreopsis travels on nights to the watercolumn, why don't I see them partying under microscope?

 

[taricha]

What seems concentrated on surfaces is very dilute when spread in the water.

If the ID is correct, and you see the surfaces clear overnight, then you need to troubleshoot the UV. Test, clean, replace etc.