Thank you for the reply coryman. Unfortunately, my cory did not make it...he developed a bright red spot on his side behind his gills (almost looked like internal bleeding/hemmorhaging of some sort) over night and died shortly after ):

I now have only one remaining cory...who is also unwell ...

I did pwc's (and vacuumed the substrate) almost everyday for about a week and a half, and I also dosed prime, and decreased feedings. I was able to get the ammonia down to slightly below 0.25 ppm, but I haven't been able to get it all the way down to 0. I am currently treating the tank with a second ...

My skunk corydora is in bad shape.. i'm not sure what's wrong with him and need advice ASAP! About 2 weeks ago, I noticed that the barbels on one of my skunk corys were almost gone (they are very short and stubby compared to the other cory). He was still eating and seemed okay otherwise, so I kept a ...