I was wondering if you can help me with a few questions since I am a new clown loach owner.
1st, I recently took over my friends 55 gallon tank and transported all fish and tank to my apartment in Naugatuck CT. At first, The fish were fine and happily swimming but I noticed that latley their skin color decreased and it looks paleish. I was wondering what that is from and how I fix it. I have an air filter and heater in the tank along with and an aqua turf filtration system and a huge tunnel log that they love to hide in. I also have a catfish and a silver dollar fish that are fine. I am not sure if its the water from Naugatuck, Since they were previously in Ansonia, CT. I also added "ready start" or whatever it is when you first start out a fishtank. Any ideas would help.

also...
2nd, What type of fish can I buy that wouldn't be a problem for them to mix with. Such as Oscars... Etc?
Thank you so much for your time

