The Rena OEM CF500 filter with UV is for aquariums 90-175
gallons and features zero bypass system for both fresh and saltwater aquariums.
Unlike the CF300 filter the CF500 comes with built-in UV (ultra violet light)
filtration to kill algae spores and bacteria that may harm fish. It is designed
to work in both fresh and saltwater aquariums. All models have a convenient
top-mounted self-priming pump that eliminates tedious manual siphoning. Once
started the filter routes water from the down the inside of canister on the
outside of the media baskets and up through (up-flow) the four media baskets.
The baskets come prefilled with media including two levels
of mechanical filtration, one level of chemical filtration and two level of
biological filtration before exiting back into the aquarium. The intake system
is very robust and has a built-in surface skimmer to remove floating debris
before it sinks to the bottom of the aquarium. The discharge features an
adjustable flow control with optional use sprinkler discharge or use the two
fan type sprayers if you prefer. This system can be used in a wide variety of
aquarium setups that require a full aquarium. Other media can be used but these
filters are only tested and warranted with genuine Rena OEM Aquatop media.
Filtration equipment can reduce maintenance but should never be used as a
substitute for regular cleaning and maintenance.
SKIMMER NOTE:The skimmer is optional use and works best in aquariums with fish. If you have a different need such as turtles then use the standard intake without the skimmer so the intake rests closer to the bottom of the aquarium.