Retrocube is kinda catchy. Sadly this tank isn't older than me...but it is going on 25! Most of these were probalby destroyed during the grunge era.
I think LED will be the way to go. Even CFL would probalby generate too much heat. I'm considering trying a RGB led with the remote
. And as for the UGF... not sure it would work well with sand, but I'm considering doing a sand waterfall involving the UGF