The True BiO filter has a unique design that is unlike regular biological combination filters filters that trap solids. Models 10,20 & 30, the water enters the filter, rises up the center pipe to feed the upper spray head to flow downward over all the cubed media prior to exiting. Pre-filtration is required for the True BiO Models 10, 20 or 30. The smaller model 5 and 7.5 include some internal pre-filter pads.

The 10, 20 & 30 models are designed to maximize on mainly biological when installed after a good pre-filter such as a bead filter or water polishing filter like our True Glass Bead Filter. The bodies used are all commercial grade and very sturdy.

Skagitek True BiO filters
True BiO logo

The media used in our True BiO filters have a unique combination of Vast Surface Area and Open-Flow Porosity that make it the most unique and highest capacity bio-filter media available today. The ceramic composition is comparable to natural rock, but with incredible surface area of approximately 150,000 sq ft per cubic foot. The properties of the True BiO's media create a stable home for beneficial bacteria that remove ammonia and nitrites. Some systems will also see a decrease in Nitrates. Also, this media's open porosity resists clogging and reduces pond maintenance.

For comparison, some $3,000 bead filters have less than 4000 sq. ft. of surface area and even then, it is only a claim, it is not backed by testing like the media we use that was tested by a University. Take Advantage of True Bio filtration and install after a bead filter or other mechanical filter.

All True BiO filters FREE SHIPPING
In addition, we include a free container of Microbe-Lift PL Gel with all True BiO Purchases! Orders may take 4 to 6 weeks to ship due to recent market issues and availability.

Skagitek True BiO 5 Filter

True BiO 5 Filter (perfect for inside ponds or QT tanks)
True BiO-5, TB 5 Canister Bio Filter, 3 pre-filter filter pads, 3 extra pads, aprox. 22 cubes of media, 2" ports, 14" tall x 10 1/2" wide. Suggested max flow rate 2400 GPH, 25,000-30,000 sq. ft. biological surface area.

The Pre-filter pads require manual cleaning. They are designed and meant for indoor tanks. This filter features an easy to view transparent dome lid to view flow rate and pads to determine if cleaning is needed. (Also great for Aquariums)

Price: $750.00 $850.00

Skagitek True Bio 7.5 Filter

True BiO 7.5 Filter W/ pre-filters (Multiple types)
True BiO-7.5, 2-section Canister Bio Filter, aprox. 60 cubes of media, 2" ports, 26.5" tall x 11 1/2" wide, PVC parts. Suggested max flow rate 4,000 GPH, 50,000-70,000 sq ft biological surface area. Upper and lower body can be rotated for port alignment for easy install. (more details at bottom of page)

A combination of pre-filter pads for larger debris and fines filter pads are included to trap smaller particulates. Manual pad cleaning is required as needed. This filter is meant for indoor or outdoor ponds. (Use of a pump with a leaf trap / basket is required for less maintenance.)

Price: $985.00 $1149.00

Skagitek True Bio 10 Filter

True BiO 10 Filter (most popular)
True BiO-10 TB 10 Canister Bio Filter, aprox. 133 cubes of media, 2" ports, 26.3" tall x 14.5" wide. Suggested max flow rate: 4700 GPH, 110,000 - 120,000 sq ft. biological surface area. Requires pre-filtration. Simple in-line install.

Price: $1180.00 $1295.00

Skagitek True Bio 20 Filter

True BiO 20 Filter
True BiO-20, TB 20 Canister Bio Filter, 32" tall x 14.5" wide. 2" Ports. aprox. 166 cubes of media, Suggested max flow rate: 6400 GPH, 145,000 - 160,000 sq ft. biological surface area. Requires pre-filtration. Simple in-line install.

Price: $1395.00 $1545.00

Skagitek True Bio 30 Filter

True BiO 30 Filter
True BiO-30, TB 30 Canister Bio Filter, 35.5" tall x 14.5" wide. 2" Ports. 206 cubes of media, Suggested max flow rate: 7500 GPH, 175,000 - 198,000 sq ft. biological surface area. Requires pre-filtration. Simple in-line install.

Price: $1549.00 $1700.00

Skagitek True Bio 30 Filter

Microbe-Lift Nite Out II

Specially Formulated for Rapid Ammonia and Nitrite Reduction and Decreases Ammonia & Nitrite Toxicity.

16 oz. treats a 500 gal. pond for 14 months.
32 oz. treats a 2,500 gal. pond for 5 months.
1 gallon treats a 5,000 gal. pond for 11 months.

Needed for new pond startup. (Requires Microbe-Lift PL).

Prices: 16 oz: $16.00
32 oz: $26.00
1 Gal: $68.00



  • Function
  • Benefits

True BiO design: The in-line design is easy to install with 2 inch disconnect unions on each port. To connect, simply install after the Pre-filter that removes or traps debris. The sturdy components are all well designed and strong. Each True BiO filter is a pressurized canister permitting installation with endless possibilities.

True BiO media: The orientation of media in the chambers of these filters create fast pathways and slow pathways for the water to move through. The combination of the ceramic with the fast and slow pathways inside the bio-filter is known to grow the most comprehensive range of bacteria for nitrogen cycle conversion. This makes it possible for nitrosomonas, nitrobacters and facultative bacteria to exist and give you the most complete nitrogen cycle possible in a biological filtration system.

Thin Bio-Film Technology

Combination of vast surface area and open/interconnected pores allow a thin bio-film to develop.

This thin film allows bacteria to flourish because necessary nutrients are immediately available.

With the open pores, old dead bio-film is easily flushed from the media and will not plug the media.

Water flows through the media, not around as with other denser medias, thus utilizing the most surface area for beneficial bacterial growth.

True BiO 7.5

Combination of pre-filters and media that has a vast surface area and open-flow porosity make the 7.5 filter the most unique and versatile bio-filter available today. This filter can be used on large or small indoor tanks including fresh water or Salt water Aquariums.

aquarium filtration and koi pond filter

The True BiO bio-filter media with Thin Bio-Film Technology™ is a ceramic media specifically designed to house beneficial bacteria that will eliminate ammonia and nitrites in aquariums, ponds and aquaculture. It will also reduce nitrate levels.

True BiO is the perfect place for beneficial bacteria to flourish in order to remove harmful fish wastes. It will eliminate ammonia and nitrites and lower nitrates.

True BiO's bio-media is the most technically advanced bio-media available today.

  • Features Thin Bio-Film Technology™
  • This same media is used in NY Aquarium of Niagara enabling them to add more sharks to the tank when the media outperformed the existing filter.
  • The media is inert and will not harm aquarium or pond inhabitants.
  • Better value due to high performance
  • Reduced tank or pond maintenance
  • Allows for much higher fish loads
  • True BiO has a smaller filtration footprint than other filters (less than 13" base dia.)
  • More consistent water chemistry
  • Media does not require replacement

Our Testing

One case test was able to establish beneficial bacteria rapidly and bring Ammonia levels to zero in five days and bring Nitrite levels to zero in 7 days.

The test was performed on a 12,000 gall on pond with well over 40 large Koi being fed up to 5 times a day. The existing filtration (2 x 100 gallon tanks full of plastic strapping and Matala pads) used plastic type media and after years, was not able to grow enough beneficial bacteria to keep up with the ever growing Koi. The pond continued to experience warning levels of Ammonia and Nitrites until our True BiO filter was installed. The flow rate for the test was 2400 gph through the True BiO 5 filter.

Back pressure

The True BiO filters 10,20 & 30 create zero PSI when tested on flows up to 5,500 gph. The spray head design is capable of 140 gpm (8400 gph)


Pond Questions
360 588-0140

Pond questions help

On-Line Purchase SPECIAL
Orders over $130 can receive a $10 valued Koi Collector Pocket Guide

Not available
anywhere else!

Priceless when it comes to learning about Koi

Discount will be applied when you add the Koi Guide to your cart.

bbb rating A+