My gf's favorite betta died last week from velvet disease, we tried to save him, but couldn't. he was huge too... we have chosen to change his tank in to a pico marine tank, only has live sand and rock in it right now. here's some pics, and i'll update whenever we do something to it.
i dunno yet, it's really my gf's choice, on what to do with it, my lfs is gonna help us with it, its only been up since thursday, so we have some time, i'll let you all know when we figure something out.