Greetings! I recently started a new freshwater tank after about 10 years since my last one. I have forgotten so much and was wondering if anyone could help me out with a juliI cory I have. Its s 30 gallon long tank that's been up about 5 weeks and has had 7 danios for 3 weeks now and I just added 3 sterbaI cory and 3 juliI cory on the 4th. Today I noticed one of the juliI have a red spot under the fins. I am not sure if it may be a normal trait or possibly sick? Any input would be appreciated!