Have you added any fish at all yet? Maybe that's the problem! I you havn't, go ahead and add some damselfishes, and put in fish food and stuff so there's acually something there to cycle. If you've already added fish, you probly added too many...see if the store will take some back. You've got plenty of filtration, don't worry about that. Hope this helps, but I don't know enough about your tank to say for sure.