Good filtration is essential for a clear and healthy pond, especially if fish are added. Nature relies on springs and streams to bring fresh water in. Marsh grasses and other aquatic plants filter impurities.

Most backyard ponds have more fish per volume than natural waterways - therefore putting more bio-waste into this relatively small closed system.

• Mechanically remove particles from the water by trapping them in filter pads or other media.
  
• Biologically, by converting ammonia to nitrites, and then to nitrates.

Aquatic plants will consume the nitrates.

External filters work better than submersed filters because they receive needed oxygen for nitrifying bacteria.

Without bio-filtration, the ammonia level can become too concentrated and unhealthy to support fish.

Tetra Pond Clear Choice Bio Filters are an excellent choice to provide all three types of filtration in ponds up to 2,400 gallons.

• Intake - Water is pumped into top inlet and dispersed by Trickle-Flow spray bar.
• Mechanical Filtration - Sponged debris removed by filter sponge pads.
• Bio-Filtration - Water trickles over the bio-rings that provide massive surface area for aerobic bacteria to thrive, Venturi inlet supplies oxygen for aerobic bacteria.
  The beneficial bacteria on the bio-rings convert ammonia into nitrites and then nitrates.
• Discharge and Nitrate Removed - Purified water is discharged out the bottom of filter to the pond. Nitrates can be removed from the pond by aquatic plants and/or partial water changes.

External filters, such as the Clear Choice Bio Filters, give superior bio-activity compared to submersed filters. External filters allow oxygen to feed the beneficial bacteria that adhere to the bio-media such as the Clear Choice Bio Balls.

GUIDE TO USING TETRA POND FILTERS - CLICK HERE

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