Ultraviolet sterilizers are additional devices that are used with filters for both freshwater and saltwater aquariums. This device helps clarify the water as well as kill micro-organisms that can harm your aquarium inhabitants. Ultraviolet sterilizers use a particular fluorescent lamp that emits light at a wavelength of 253.7 nanometers. Floating microorganisms pass through the UV light and now are unable to multiply. The UV light neutralizes micro-organisms like bacteria, algae, and parasites.
UV sterilizers come in two forms: In-line or Hang-on. You can choose whichever fits best with your aquarium. To determine which organism you may want to eradicate, adjusting the flow rate will show how effective the UV sterilizer. For example, a slow flow rate may be effective with bacteria and algae but not with parasites. For parasites, a more gradual flow rate would be more effective.
The in-line sterilizer is connected directly to the filtration system. Water that flows through the filtration system passes through the UV sterilizer before going back into the tank. With this format, the water entering the tank is clean and sterilize. Hang-on sterilizer is placed at the back of the aquarium and has no connection to the filtration system like the in-line sterilizer. Hang-on models are easier to install and maintain, making them ideal for smaller aquariums.
UV sterilizers have plenty of advantages and very easy to install and require low maintenance. These cheap devices can provide substantial health benefits for your fish if used appropriately. If you get the correct size, operate in under the right conditions and follow the manufacture maintenance guidelines, you will have a healthy and happy aquarium.