The Hobby Aqua Cooler V4 is a cooling unit for fresh and sea water aquaria up to approx. 300 l content. The Aqua Cooler cools aquariums down by up 4C, relative to aquarium size, ambient temperature, position and angle of inclination. The temperature in an aquarium is absolutely crucial for an animals well-being. Most aquarium inhabitants only feel comfortable at a temperature between 24 - 26C. This temperature should be maintained as precisely as possible. In contrast, temperatures of over 30C and high temperature fluctuations often present problems for many plants and animals, and can weaken and harm them. Lighting, pumps, room temperature and solar radiation mean that the temperature in the aquarium can increase beyond healthy levels.Hobby Aqua Cooler V4+ powerful cooling fan for aquariums+ cools aquariums up to 300 l by approx. 4C+ suitable for glass panes or aquarium covers up to 25 mm in the wide+ fans can be tilted up to 55+ easy installation on the aquarium rim+ with sa