My BBGs are thriving at 1.010 SG. I got them small from full fresh water tanks except one big one (coincidence?), now they are all the same size. They seem to get along with my violet goby, he won't let anything other than the BBGs into his favorite cave. There's also a dwarf gourami and a 2'' ghost/feeder shrimp and everyone seems quite content. The bumbles occasionally squabble amongst themselves but otherwise it's peaceful. I was going to add red dalmation mollies for more color/activity but it's only a 45g and I'm waiting until I upgrade.
Would look great though, IMO.