Hi Darren, I wonder if you could help please?!!! We are new to fish/shrimp/snail/keeping and have Danio erythromicron but out of the 16 fish we only have 6 left. Have you ever experienced swim bladder problems with your Danio erythromicron? I have seen two fish now showing the symptoms but don't know what is causing it. Our water chemistry is: Ammonia 0, Nitrites 0 and Nitrates 10ppm.