deworming

Hello! I am posting an update concerning my betta, Cornelius, who has been developing a bulge on his side and whose fins have been deteriorating. First pic is when I got him, second and third are from about a month ago, when I made in my last post. @Colin_T advised deworming, which is what I...

Hi everyone, I purchased 6 Discus about 5 weeks ago in my 75 gallon aquarium. Everything in the tanks is going well; the chemistry is good (pH: 6.5, hardness: 25, Nitrate: 5, carbonate: 20) and all fish are growing fast and healthy. But one discus, pictured below, seems to be a little skinnier...