I love my medium tanks (20 to 55) They fit my fish and plants well. I really love my 48 bow front. Its fully planted with large rocks and drift wood. I use this as my "nano" tank. stocked with about 12 of each type of fish, rummy nose, octos, sterbie cory's, red and orange tetras, lemon tetras, pygmy cory's, amano shrimp. and I am forgetting a few. The activity with this tank is wonderful to watch. It right next to my couch. Really like by 55 with 2 pairs of koi angels (6 to 8 inches) Breeding weekly and some cory's. I just like this size tanks.