Right now I only have a 125gal. I just upgraded from a 55gal though.
OK so I just called the fish store that I bought my arrowana from. They told me that I must have been starving my knife fish in order for him the eat the arrowana!! I usually give him a dozen feeders on tuesday and a dozen on sunday. He told me I should have 100 feeders in the tank with him, and if he always had food in the tank, he wouldn't eat my expensive fish. I feel like that is really overfeeding him. He wont eat pellets or anything else, only feeders. What are you guys feeding your knifes that are close in size? I don't know how much I should feed him, and how often. PLEASE HELP!!!