by far, my biggest mistake was moving way too fast. I didn't give my tank enough time to cycle and then listened to my LFS and started with agressive fish. I dont have anything against agressive fish but after reading more about the fish I purchased, realized, that isn't what I really wanted. I ended up loosing about $200 in fish and finally started over. So, read, read, read, and then read some more. Be patient, your tank friends will love you for it. browse the message board. I got great advise from everyone here. And, have fun. Good luck.
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