10-17-2008, 08:52 AM
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Not to sound like a jerk, but those fish are not going to work out long-term. The iridescent shark gets three feet or more in length and prefers to be in a school, so it's really not a suitable aquarium fish at all. I'm assuming the dinosaur eel is some sort of bichir, in which case it will eventually need a bigger home (55g should be good). The Dempseys and blood parrot will also outgrow the tank, but the more immediate problem is that as they get some size on them, they will very likely decide that they don't like each other. Watch out for aggression between the parrot and Dempseys and remove any fish that are getting picked on. If the Dempseys are a male/female pair and start to breed, then your other fish will definitely be killed. In the event that all of your fish get along, I would eventually want at least a 90g tank for the bichir, Dempseys and blood parrot, and you would need something on the order of 1000g if you keep the shark.