The Marin 500 filter system is designed for use inside the aquarium. It consists of a filter tank with dimensions of 19" x 8" x 26" (including foam cup). Water is fed to the protein skimmer chamber by way of a surface overflow and pre-filter sponge.

The motor driven protein skimmer is supplied with a patented Needle Wheel pump (Ocean Runner PH 2000 18 watt). From there it is pumped to a biological trickle filter, filled with Bactoballs. A Dosing Pump SP 600 supplies water to the Nitratereductor. An Ocean Runner PH 2000 (500 gph) pumps the water back into the aquarium. With the Marin 500, an existing tank can be transformed into a powerful salt water aquarium without any external plumbing or modification. For aquariums up to 125 gallons.

The Nitratreductor 1000 is an anaerobic biological reactor for removing nitrates from marine and freshwater aquaria. It has a large volume of 4.5 gals and an internal circulation pump. The Nitratereductor 1000 works with a flow rate of .25 to 1 gph. In the absence of oxygen this situation promotes bacteria that metabolize nitrate. Denimar powder or Deniballs are used as an organic energy source. To monitor this process, it is possible to use a redox potential controller (ORP controller) in conjunction with an electrode inserted in the inbuilt PG13.5 port. The Nitratereductor 1000 is a closed unit that can be integrated into filter systems, but may also be installed to stand alone under the aquarium. Dimensions excluding electrode (l x w x h): 7" x 7" x 22". For aquariums up to 250 gallons.

Deniballs are made from a special biologically based plastic material. In the absence of oxygen, anaerobic bacteria metabolize this material. The bacteria are used for the reduction of nitrates - reducing nitrate to nitrogen gas. Changing the Deniballs after approximately 12 months is recommended to ensure safe and maintenance free denitrification in fresh and salt water aquaria.

The bacteria in an anaerobic biofilter ned organic nutrients as energy source to remove nitrate. Denimar contains organic substances, that dissolve slowly in water and are taken up by the bacteria. If Denimar is dosed daily, high nitrate removal rates can be reached in the Nitratreductor. Denimar is suited for salt and freshwater aquaria. Contains no fertilizers and does not promote algal growth.