charliebankston
Aquarium Advice Addict
Not sure about the claims of prime either. I do use it also, but I'm dubious if it works like they say. I read where 80ppm and higher is lethal, over 40ppm long term is damaging or lethal also. 20ppm in freshwater is more ideal. Not many of my tanks are that low, I keep alot of cichlids and they destroy plants. I wish I had 20ppm in all my tanks