I use to have 2 of the kuhli loaches. I loved them! One lived about a year and the other one lived for about 4 years. They didn't come out much, but when they did I enjoyed them. Sometimes they would hang on the little suction thing you attach to the thermometer.... Their names were Eeyore & Tigger...I enjoyed them so I recommend some; they're very friendly fish so you can put them with lots of different kinds!