Okay, yes, dose a little.There is no skimmer in the 20G which is the one that has the dinos, I was referring to dosing skimmate from my 180G tank, which has high nutrients.
I think they go into the water column, I don't see as much on the surfaces when lights go out, and I occasionally see some floating on the water surface throughout the day. Which looks slimy and bubbly when on the surface of the water
Dose h2o2 at lights out 1ml per 10gallon volume.
Dose some bac in the morning.
UV I totally recommend. Jaboa has one for cheap.
I only ran it at night when they hit the water column.
As they die, remember activated carbon will pull out the toxins.