Thanks - I'll plan on two DG's and hopefully they will be ok together. I don't think I'm ready for live plants yet - maybe someday. But, I did try to buy the nicest silk/fabric plants I could find (no sharp edges) I have about a dozen plants in the tank (a couple are plastic, but they seem to be softer), a large (fake) stump from PetSmart that they can easily get into and under and a large-ish log that someone can hide out in easily.