Hey everyone, my buttikoferi has been acting odd. It has been hanging out by the heater, and turning completely black instead of the blue and white. He has been thrashing around the past few days and getting startled easily as well. He is about 7" and he is housed in a 20 gallon. He has plenty of space to swim around and doesnt really do much. He has been just leaning to one side of his body and letting the current take him around. I did a 50% water change when I realized this behavior. Could he be a she and maybe this is spawning behavior? Im very concerned and I love this fish. Tomorrow if he isnt looking better I will either continue to wait it out or I will switch my baby oscars into the 20 and put another filter on the tank and put my butti into my 65 until the oscars get big enough to hang. Has anyone experienced this before? This is all freaking my girlfriend and I out and I would be devistated if I woke up and found him dead tomorrow. I added a very small amount of prime in case there is still some chlorine in the water after the water change. Thank you everyone