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Hello fellow fishians! I have had a German blue ram in my 30 gallon fish tank with a gouramI for a pretty long time and all of a sudden he has been a complete crab to the rest of my fish in the tank. My heater did back and do last night I put a small one in to get the temperature back up from 74 to 81 and that is about when he started all this. My thoughts are that the sudden change in water temperature is making him want to mate and do he has been doing stuff to the gouramI like trying to rub himself on her. That is really all I can think of. Any advice on the topic? I have him in a large net for now till the temperature goes down so that he won't be mean to me gouramI any more, she is my life.