Correct, it won't cure the fish that potentially have it now, but would the sterilizer prevent the bacteria from being free floating in the water? Lets say I got a few new fish (hypothetically) would it keep them from becoming infected.
I've lost 6 fish so far, and for a little background on them. They were all female bettas that I had acquired from the same breeder and the same shipment within the last 1.5 months. All of them were in quarantine in 2 separate tanks, but unfortunately I had recently taken 2 out of qt and put them in the sorority tank.
The first one I lost was soon after receiving - she an injury that had some fungus I cleared that up - Then she got dropsy after the fungus had cleared, and passed within a couple of days.
The second betta I lost had dropsy
The third, & fourth just stopped eating
The fifth was fine one day and dead the next no symptoms
The sixth looked to have a cut or something on her side - I removed her from the tank and put her back in a qt tank and treated with antibiotics, but the cut turned in to a gaping wound and she only lived a couple of days. This one I'm pretty sure was an injury in the tank, as I found a sharp piece of slate exposed. It has now been covered.