Oversized is key, we have a few good tanks done/fixed on nano reef.com where using any normal uv is grossly oversized. We try to take immediate action when first seen, against the common grain of literally do nothing as the mass blooms.
If I had a large tank and wanted to win I would use a pond sterilizer and change out the sandbed along with external peroxide treatment of the rocks immediately upon visual detection of the invasion. Even though we aren't using species-level ID for the dinos in nanos I'm not sure ostre couldn't ever be there...they seem to appear rather commonly in the microscopy posts as pages go by
Larger tanks can't do the cleaning in a practical manner so the war is reduced to water actions only, agreed.
Anyone with a nano getting these invasions should strip clean the whole tank using skip cycle technique and do a full water change ASAP matching temp and salinity. Attack the blooming self supporting mass
Then hopefully oversized UV handles resurgence from fish vectoring etc...
It's not unfounded to surmise that once robbed of communal mass, a communal organism might have a harder time thriving. The aggregations are insulation for one, food catching goos #2, etc
Someone should be purposefully infecting test nano setups with known virulent strains to see how well physical vs chem interventions work, speed up our knowledge without sps in tow...
I claim the worst initial move 90% do is farm the mass on purpose, the inaction reaction to dinos, many species like that mode apparently.
Perhaps there is a finite time the cells can live without the communal resources... This would allow for known QT times matching that death cycle, and it might give an idea how long keepers like Waters have to run the UV preventatively after the initial gains
