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Gravity Flow Filters

  The advantage of the gravity flow filters is that they are generally inexpensive to purchase and install.  All you have to do is put a pump in the pond and hook it up and you are filtering! It is that easy.

OASE Bio-Clear Filtration System

  Cloudy, dirty water and algae are common problem Pictures in ponds. Floating particles due to an excessive supply of nutrients, dead plants, over fertilized soil, acid rain, fish excrement and left over food are the cause of these problems. The decomposition of these particles produce ammonia, which is harmful to all living beings. OASE’s unique Bio Clear Filter System transforms ammonia into nitrite using bacterial processes. The Nitrite (which is still harmful) is then changed into harmless Nitrate. Nitrate actually constitutes a healthy nutrient conducive to plant growth.  
Another unique feature of the Bio Clear Filter System is the easy handling and cleaning. An indicator automatically gives the degree of pollution and shows when the filter needs cleaning. The filter is cleaned by simply removing the inner dirt tank, rinsing it with clear water, and reinserting it again. The temperature indicator and the Bio Clear - Plus-Zone, used for receivi Pictureng efficient additives, are additional, unparalleled, characteristics of this unique filter system.  
NOTE: We advise you not to clean the tank and bio cartridges too thoroughly so that enough bacteria can remain in the filter to continue the decomposition of noxious substances. The efficiently of the Bio Clear Filter System can be easily increased by using a parallel connection of several tanks.
Warranty: If used properly, OASE gives a three-year warranty on the Bio Clear Filter System.

OASE Bio-Clear Filtration System - NEW Lower Prices!!!!



Max. Pond  Gold Fish

Volume   Koi

Max Flow Rate


Bio Clear 5 P/N-88302

19.7” X 15.7” X 17.7”  2 - Chamber System

4756 Gal

2378 Gal

1450 GPH

$ 155.99

Bio Clear 10 P/N-88303

31.5” X 19.7” X 17.7” 4 - Chamber System

7662 Gal

3699 Gal

2650 GPH

$ 311.99

1) 1" standard threaded connection Picture
2) Spray Aeration: Strong whirls of water in the inlet
  supply the pond with air and thus with oxygen. This
  is important for the biological efficiency.
3) Blue Zone:  Course dirt particles are kept in the
  voluminous blue bio-elements. Thanks to the
  oxygen rich blue zone bacteria develop quickly and
  transform ammonia (extremely dangerous to fish)
  into nitrite.
4) Bio elements:   The granulate has a large surface
  and is ideal for an aerobic and anaerobic
  decomposition of pollutants at the same time.
  Harmful nitrite is decomposed.
5) Red Zone:   Mechanical filtration, biological
  filtration and lack of oxygen allow bacteria in the red
  zone to decompose into nitrite. Nitrite can be
  absorbed and decomposed by plants in a natural way.
6) Denitrification Zone:   Thanks to water that is poor in oxygen; microorganisms change excessive
    nitrate into harmless nitrogen.7) Dirt TankThe dirt tank is made of environmentally friendly
    polyethylene. It can be completely removed for cleaning. The biomass is easily filtered out of the
    pond water and kept in the tank.
8) Bio Clear-Plus-Zone:    This system was developed specifically for introducing different materials
    to the filter. These materials can be used to increase the ability of the fiber to eliminate phosphate.
    It can also be used to add filter starter and other biological additives
9) Pollution IndicatorIf the filter system is operated for a long time a high concentration of biomass
  may accumulate in the filter. A special system measures the degree of pollution and indicates when
  the filter should be changed in order to guarantee maximum efficiency.
10) Temperature indicator:   Microorganisms such as bacteria at a temperature of more than 50
    degrees F. Water, which is too warm, may cause increased algae growth and eliminate the majority
    of oxygen in the pond. The indicator shows you the ideal temperature for the pond and the
    activity of the bacteria.
11) Double Tank:   The tank is made of environmentally friendly polyethylene. It can be buried in the
    ground of stay above ground as a stand-alone unit.
12) Filter Outlet

Call 1-888-551-4343 for quotes on all installations, service, maintenance, ordering, and consulting

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