I have bichirs, fire eel, and ropefish. What should their diet be? I can get frozen tilapia and shrimps at the store, I also have blood worms. The fire eel is 10 inches, bichirs 5.5 inch, and ropefish 10 inch, how often do I feed them these foods? Is it tilapia one day, then the next day shrimps, next day blood worms, and so on? If so, do I feed twice/once a day or every other day? Lastly, should I just thaw out the tilapia and shrimp and then feed it?