Well I don't have a test kit or the money to get one. But basically all I can do is describe the sickness to you in more detail. Well umm today it's a little worse on his fins. The tips of his back fins have became almost clear instead of black and there seems to be a little damage occurring to the fins. But he is still active and not laying on the bottom of the tank, and he still is eating which I assume is a good thing but that's about all I could tell you. Also I change the water once a week and feed them in the morning and at night. And they have never shown any problems until now.