I have some King Tigers which have great looking tails... I don't see much else of them. I've had them a couple of weeks now and they just don't eat. Ive tried shrimp pellets, cichlid crumbles, flake food, bloodworms... they just don't seem interested. How long would it typically be before they settle in and start to eat? I'm putting food in at lights out and in the morning the food is still there. I know they can take a little while to settle, but should I be concerned?