Welcome to the forum Jason.
You are getting good advice to do a large water change, not a wimpy little 50% one. You have a fish in distress that needs clean water soon. If you are not getting a perfect temperature match with the new water, go cooler rather than warmer. I believe the maximum temperature for C paleatus is about 25C so warmer will cause some stress. If all you have in the tank is the catfish, it would do better a few degrees cooler actually. The C paleatus, peppers, are able to survive in a tropical tank with fish that need warmer water but are not really going to do best at that temperature.