Up Aqua Electronic Heater is a relative new product to hit the aquarium world and it works well in any aquarium. For aquarium inhabitants it is extremely important to have a uniform water temperature that is appropriate for the species, and that is consistent. The fewer the fluctuations the better. Temperature fluctuations means stress and a possibly life-threatening situation for fish and other aquarium inhabitants. If the water temperature increases, the metabolic activity of the fish also increases considerably. The oxygen content of the water is also temperature-dependent. The warmer the water, the less oxygen it can absorb. Features: – Supplied with suction cups – Precise and wide range of temperature adjustment – Over temperature protection – Short circuit protection – The independent controller contains 2 sets of control lines and temperature sensors – Designed for continuous and extended use Specifications: 100W – suitable tank size: 35-60l – length: 22.5cm – wide temperature range: 20-32 degrees celcius Specifications: 200W – suitable tank size: 60-160l Specifications: – suitable tank size: 160-250l – power: 300w – length: 34cm