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Klir Di-4 Fleece Filter Features

  • Easy drop-in installation even in tight spots
  • Fully automatic with smart controller
  • Compact and directly replaces 4-inch filter socks
  • Holds 25 yards of 50-micron fleece
  • Capable of filtering up to 750 GPH per unit
  • Removable lid with carbon insert for noise and odors
  • Expandable to dual units for higher flow rates

Modular Mechanical Filtration at its Finest

The Patent Pending Klir Fleece Filter Di-4 fits directly into most 4in filter sock chambers that automatically unrolls new material as it gets clogged, removing suspended particles from your aquarium and producing crystal clear water.  Enjoy maintenance-free aquarium filtration for months at a time.

The Klir filter is a direct replacement for filter socks on sumps with sock trays. Simply remove your sock and insert the Klir.  As water passes through the Klir filter and the filtering material becomes saturated with waste, the water level will begin to rise.  When the water makes contact with the optical sensor, a motor is activated to advance clean filtering material. As clean material is exposed, water is now able to flow freely, lowering the water level in the sock tray and deactivating the motor. 

Klir's filtration provides three main benefits:

  1. Results in crystal clear water filtered down to 50-microns — double the filtering capacity of most filter-socks.
  2. Waste is removed from the water column before it has time to breakdown, helping to maintain low nutrient parameters!
  3. The constant chore of monitoring and swapping filter socks or other mechanical media every few days is eliminated for months at a time. Once the filtering media is exhausted, replacing it is a snap and very economical
  4. Klir Filter Includes:1 - 50 Micron / 50 Yards of fleeceKlir offers a filtering capacity of 50 microns making it two to four times more efficient than filter socks.
  5. Most aquarium mechanical filtration incorporates 200 micron filter socks which begin to clog in a matter of days. Some very brave users opt for 100 micron socks which clog in mere hours. Leaving filter socks in your system any longer are detrimental as food and waste begins to decay within the filter sock.

    Klir removes waste from your water column before it has time to break down and consistently filters at 50 microns unlike filter socks, whose filtering capacity naturally diminishes as they are used, washed and reused.

Optical Sensor & Controller


High-quality dual optical sensors and a smart controller automate the advancement of new filtering material as it's needed, allowing for set-it-and-forget-it installation.

Features optical sensor with no moving parts, eliminating the possible mechanical failure of traditional float valves.

A bright LED indicator and audible alarm allows you to see and hear the status of your Klir Filter.

A motor kit can easily be added to the Klir Di-4m and Di-7m manual models to upgrade it to an automated solution.



Current Stock:
5.00 (in)
5.00 (in)
12.00 (in)
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