So we have had a string of julli corys dying on us. Like one every couple of weeks. They all look good when we buy them, nice and big and eating well. Then we get one that will just stop doing much and just sit around a lot and do nothing except randomly dart around the thing and sometimes twitch a lot. Then one day we find the fish dead and looking very skinny and small.

Our best guess from what we read is that it is some type of internal parasite that is killing them off? They are wild caught and what we read says that can be the case and the symptoms fit so we went out and bought some Tetra Parasite Guard which was what we read works well. We does the tank according to the instructions and are now waiting to see if it works and the one cory that currently looks bad gets better!

Any of you have any thoughts? Are we on the right track or way off?