Tank on right has been empty probably longer than it has had animals since it was built. Started with red piranhas, but they eventually died from a water problem. After empty for years, we had small colorful mosquitofish, but same thing happened to them. Now after being empty a couple years we are going to try a basilisk lizard. (We're in the desert, so we know more about lizards than fish LOL).
He was just introduced so the glass is covered with green paper temporarily. I peeked through the openings, but could not spot it.
