Some personal things to note, -around the same time I started using, Im getting crazy bba growth- even in the tank that had no bba, and then some shrimp/pygmy cory deaths who were all super active before.. could have been a coincidence, but I didnt test my water to really look into it.[/QUOTE]
I actually dose more than what's recommended and have not lost any of my amano shrimps and cories. Fishes also doesn't seem to be bothered by the high CO2.
BBA can be from an imbalance of lighting and co2 or there's not enough circulation in the tank. I had it at one point, added two nano power heads and now it's fine. Only one spot, bottom left front, I get a little growth on the substrate