Hi I have a 55 gallon tank and have 2 tinfoil barbs, 3 silver dollars, 2 pangasius catfish, 1 CAE, and 2 angelfish. I was wnodering if I could put a golden dojo loach in there. Ive read they need to be kept in groups but they are a little expensive where I live and I was planning on getting only one. Would this be okay?