[karimwassef]

DNA, sorry that the slow flow UV doesn't work in your tank.

It might be that we need to start matching different dino strains and the treatments that work for them.

Maybe even with a species like Ostis, some can be eradicated with UV. In your case, the fact that is seems to make it worse may indicate that you have multiple strains at once. The UV may be killing some, but that may encourage others to bloom to replace them.

Did you go dark with slow flow UV? Did you use a skimmer afterwards? It would help to understand your approach and align it with your strains.