Hi. Long time lurker, first time poster. So, I recently dusted off my ancient 29 gal tank from storage which is currently in the cycling process. I also picked up a 20 gal tall at Petco while browsing fish ($1galsale/I have no self control). I have them set up right next to each other in the dining room. Initially, I planned on making the 29 gal a fresh community tank, and the 20 gal a small salt tank. Researching the cost of a salt tank quickly changed my mind. The 29 gal currently has a large piece of driftwood and sandstone caves with a white sand substrate. The 20 gal is bare. I considered some black diamond blasting sand for a substrate, but that is as far as I have gotten. Any ideas how I can set up these 2 tanks to differentiate them? I don't want what will essentially be two community tanks. Chiclids in the 29 would be cool, but i guess the tank is a little small for that. I was thinking a school of coreys, tetras, and a centerpiece (ram?) For the 20 gal, I am all ears (maybe a guppy tank?). Or i could take a common sense approach, and take the 20 gal back to Petco.