My tank is a 75 gallon brackish community. I have rocks, driftwood, and fake plants in mine. There is one medium size piece of drift wood, and two small branches. The rocks are lace rock, one is 25 pounds and the other is 20 pounds. The puffers loves to weave in and out of the plastic plants (I would estimate that I have about 15 plants in there) and chase each other and their food. The other fish love all of the hiding places and can escape the puffers when they go crazy. My advice to you would have lots of fake plants to break up the lines of site and leave it at that. Do not even worry about real plants. Get some lace rock too, it looks nice.