Frog Pond Aquatics has added 4 new mini-heaters to our regular line of glass heaters. Smaller aquariums have become so popular in recent years and along with the popularity of reptiles and turtles there is a definite need for smaller non-glass heaters. They provide the ultimate in safety for tanks located in play areas or younger users rooms. plastic heaters can be fully submersed and mounted in a variety of ways to accommodate any small tank setup from fish to reptiles. Please pay attention to the directions included with each unit for proper use of the heater.