I have a 55 gallon tank with freshwater fish. Recently I had to put to sleep one of my 2 dwarf powder blue gouramis. The remaining fish seems to be missing his partner. He/she sort of stayed by the ill fish before I euthanized it and now it seems to swim up and down and back and forth as if searching for something. Should I get another companion fish? When both fish were healthy, they seldom interacted with each other!
