hi. i've restarted some of my tanks too. hahaha. i have 4 and 2 of them i restarted already. it just came to a point where i just didn't like how they were running. hehe. anyways, goodluck with your new set up.
Water parameters? If your parameters are good and you are certain you fixed the problem you had have you ever thought about stocking with rainbows? Australian and Bosemani's are gorgeous fish could be a good start.