These filters are gravity flow which means the water flows out of the filter as fast as it is pushed into it via a pump. As they are not pressurized, they will need to be placed above the area they are flowing into. For example, if you want the filter to flow into your waterfall, the unit must be placed above the waterfall area.
THESE FILTERS combine UV clarification and biological filtration to guarantee crystal clear, purified water. Water passes in front of the UV light, which causes algae to clump and die. Then, the filter sponge traps algae clumps and other debris, allowing clean, clear water to enter the pond.
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