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This SunSun JUP-01 9-watt UV sterilizer is a good choice for smaller aquariums up to 75 gallons. It works well for saltwater, freshwater, and ponds as well. The best feature of this sterilizer is that it doesn’t require any additional hardware or pumps as it already includes a water pump that can transfer almost 132 water gallons per hour of UV light. It is easy to mount as it uses suction cups to connect to the interior of the tank either vertically or horizontally. Its only downfall is that it does not work well with fish tanks of larger size.
- Aqua Ultraviolet 25-Watt UV Sterilizer
This UV sterilizer is a versatile device that is designed to handle large aquariums. It can serve fresh environments of up to 1200 gallons and saltwater tanks of up to 150 gallons. This product as such looks small with only 2 inches between inlet and outlet. However, the sterilizer is 3.75 inches wide, 6 inches high and 20 inches long. This UV sterilizer has an already installed transformer and a quartz lamp sleeve with the longest lamp lives. It is plumbed inline that makes it simple to install with being able to use it indoors and outdoors as well. Its only disadvantage is that it can take up to a week to notice results.