Okay, so I was skeptical at first because my betta fish, Blueberry, was looking super lethargic after a rough transition to his new tank. I tried everything—fungus meds, antibacterial stuff—but nothing worked. Then I stumbled upon KOIKA BAC+.

First off, yes, it smells kinda funky (like a mix of butter popcorn and... something else?), but within HOURS of adding it to the water, Blueberry started swimming around like his old self. By the next day? Totally fine. Magic in a bottle, I swear.

I also noticed my shrimp are way more active now, and the tank water stays crystal clear. No weird discoloration or anything. Plus, they go nuts for food mixed with this stuff—like they’re thanking me for it. Adorable.

Only downside? The bottle arrived without a sprayer (ugh), and the instructions were in French (??). But honestly? Worth it. My aquatic squad has never been healthier.

10/10 would recommend—just maybe open it near a window if you’re sensitive to smells.