The IQ Thermo mini heater is made for most mini aquarium use. Its heating element is only 115mm in length which takes up minimum space in the aquarium. It generates 30W of equivalent power that makes heating process even faster. The Dymax IQ Thermo is specially equipped with a LED electronic temperature display controller which is run by a micro processor base system that effectively control the desired water temperature without overheating. The length of only 115mm makes it possible to be hidden in the filtration chamber of mini tank like Dymax IQ3 or IQ5.