An Aquarium Chiller is a very important piece of equipment used to maintain proper water temperature which is critical to the health of your fish. A daily fluctuation of just a few degrees can be very stressful and can contribute to illness and even death to some species. Take the temperature late in the afternoon with all of the equipment running. This temperature should be the highest setting on your heater. If this temperature is consistantly too high, you will need to add an Aquarium Chiller. A water chiller aquarium is the perfect solution to regulating your water temperature. Providing proper water temperature is essential to your fish's health and well-being and will save you the frustration of dealing with disease.