I am not sure if mine was a bacterial bloom or not. The cloudiness started when I had water suck through my co2 scrubber and into the tank. It seemed to turn cloudy instantly and never let up until I used the clarifier.
I have used a uv sterilizer since about two weeks of the tank start which was before it turned cloudy.
I always use Biospira. I actually do think the stuff works as I had nitrates within a week of starting the tank.
Bubba the white water from the co2 scrubber is brutal. I’ve had that happen. Air pull was so strong it sucked the foam into the scrubber for a couple weeks without me noticing and fluidized the whole thing. Ph up over 9.5. Water looked like skim milk.