Hello, I have had an aquarium for almost 2years now. I never really had any issues. I test the water frequently and vaccuum once a week including water changes. I noticed that my peacock bass (having been very aggressive eaters) stopped eating. They were eating pellets and they have had two helping of fish in the past year. I have 2 year old pacus and they are getting big (15") they eat vegetables. I had one bass get red spots (growth) all over. He was the smallest of my 5. I came home and he was gone. Assuming the other fish ate him. My bass are around 5". I have 3 left since I came home last night and one was gone. Also my pleco has seemed to slow down a bit. So, here is the story. 15" pacu(2) 5"peacock bass (3) 8"pleco(1). Aquarium is 240 gallons. Water test this morning reveals normal ranges, temps are around 80-82, I have an overflow filter (110 g) a fluval fx5(400 g) and a marineland c360(100g) also have 2 current producing fans.. Pacus seem to always be doing great. My last assumption is that my Pacus are causing stress on the others and making an unstable environment. I have tried to get rid of these pacus for the last 8 months. The only lady I heard of is in san diego and she apparently rescues them and then donates them to the sea world Pacu tank. She hasmy info and still hasnt reached me. The pacus were my first fish,I didnt know too much about aquariums nor that the size that the pacus would get. I love them but I would like to see them move on to bigger things (mainly a larger aquarium) I am happy to see the local pet store i purchased them from no longer sells them. I refuse to dump them in the local waterways ( i am also a fisherman). And I refuse to give them to someone who just wants big fish and doesn't have the space for them. Any advice will be apreciated.. Anyone have a larger aquarium they would like to trade/sell.lol Thanks.