What kind of filter? You usually need to overfilter tanks with predatory fish.
Is it possible you overfeed? I only feed my fish what they can eat in 2-3 minutes once per day, 6 days a week. I also feed them plant based foods once a week (Spinach blanched With garlic, rinsed, and added to the tank for 5-10 minutes and then remove excess), and bloodworms once a week. (both in addition to the staple)
I just noticed your screenname! I like it!
Glad to help kthxbai!
Last edited by redchigh; 11-24-2012 at 03:31 PM..