Filtration
©2008 Koi Valley - All Rights Reserved.
Home | Contact
Apple Valley, MN. 55124  USA
Phone:  952-738-1653
E-mail: koiValley@yahoo.com
Koi Valley is proud to announce the addition of the CL-3 and CL-10 Clarity Water
Treatment systems!  These freshwater foam fractionators will give you that gin
clear water you've been looking for!
Clarity™ Protein Skimmer / Foam Fractionator

OFFERS SUPERIOR WATER QUALITY:

*Highly efficient in fresh-water and salt-water
*Removes CO2, phosphorus, total nitrogen and nitrate  
*Ensures stable water-conditions
*Creates optimal health and growth conditions
*Can be combined with ozone treatment
*No need for additional treatment after skimming
*No chemicals
*Low maintenance
Clarity™ is a unique Protein Skimmer/Foam Fractionator with
distinct benefits:

Highly efficient in fresh water.

The effectiveness of traditional Protein Skimmers or Foam
Fractionators in fresh water is restricted by the lower density in
fresh water and therefore the ability to form small enough bubbles
with enough surface area to attract the organic waste. Since
Clarity is based on an entirely different approach, Clarity does not
have this limitation. This results in superb efficiency also in fresh
water and opens up many exciting applications for Clarity.

Regulates the level of oxygen in water.

During the normal process of feeding fish and decomposing of
organic matter, the level of oxygen in the water is altered. These
environmental changes are not desirable for the fish and result in
increased stress and unhealthy conditions. Clarity’s mode of
operation restores the balance of oxygen in the water as part of
the process of making the foam.
Clarity™ – a unique Protein Skimmer/Foam Fractionator
Breaks down ammonia and nitrite to nitrate before foaming.

As the water trickles down the airing tower, bacteria fastened to bio-rings decompose organic compounds to
simpler, less toxic substances. The most important example of this process is the breakdown of ammonia to nitrite
and eventually nitrate. This lowers the toxicity of the compounds and results in a more effective removal of organic
compounds.

*Removes organic waste - Reduced DOC

*Helps Reduce Blanket Weed!

*Low Maintenance

When used in addition to your existing filtration, Clarity™ units deliver that elusive extra dimension in water quality
sought by serious Koi enthusiasts worldwide.

Low maintenance.

Clarity is easy to install and can run for several months without any maintenance (dependent on the quality of the
feed water).  Since there are no moving parts and thus no wear and tear, Clarity has a long life span, increasing
the financial investment in this unique Protein Skimmer / Foam Fractionator.
Why a Protein Skimmer / Foam Fractionator?
Water in confined areas (e.g. fish tank, pond or lake) has a certain level of organic waste and nutrients which
affect the quality of the water. The organic compounds cannot be seen directly; however, once the level is high
enough, the effects can be seen in the water. Some of these effects are:

*Increased algae and plant growth
*Decreased clarity
*Poorer fish health
*Decolourization
*Unpleasant smell and taste

Many devices and procedures exist to remove some of these effects (e.g. mechanical, chemical or biological
filters, or simply exchange of water), but Protein Skimmers or Foam Fractionators remain the preferred choice
for removing the organic waste from water.

The organic waste (also referred to as Dissolved Organic Compounds = DOC) results from decomposed plant
matter, fertilisers, fish fodder and excretions from farmed fish, which have been broken down and dissolved in
water.

High levels of DOC are undesirable in the water because it leads to:

*Less oxygen
*More bacteria, algae and parasites
*Build up of toxic substances for the  fish

Altogether, this results in unhealthy conditions for the fish, affecting both health and growth conditions of the
fish.

Protein Skimmers, also called Foam Fractionators, work on the principle that most DOC and nutrients in the
water have bipolar properties, meaning that one part of the compound prefers air and the other part prefers
water. This means these compounds are attracted to air bubbles in the water. When sufficient DOC has bound
to the air bubble, stable foam is created and collected. The smaller the air bubbles, the larger surface area and
more effective the Protein Skimmer or Foam Fractionator.
Principles of Foam Formation
How it Works
Clarity™ consists of one integrated unit that performs several
distinct functions:

1.  Breakdown of complex organic matter to simpler,
less toxic forms (ammonia -> nitrite -> nitrate)

2.  Aeration of water, restoring the right balance of  O2,
CO2 and N2 in the water

3.  Formation of foam containing organic compounds (DOC)

4.  Collects foam in the patented foam collection unit

Functions 1 – 3 occur in the trickle tower column, and function
4 is carried out in the patented foam collection unit.

Together, these functions result in a highly effective system for
removal of organic waste and result in high-purity water
conditions.
Results
Efficient removal of nitrate from fresh and salt-water:
The test was performed in 600 L reservoirs by adding nutrients at different salinity and measuring the nitrate
level in the water after 2 hours treatment with Clarity.
Clarity™ has been tested and found to be highly effective in removing organic waste in both fresh and
salt-water, and in actual practical situations:
Removal of nitrogen, nitrate and nitrite from a fish pond:
Treatment with Clarity™ gave approximately 40% reduction in total nitrogen, nitrite and nitrate in a 30 000L fish
pond after just 9 days with recirculation every 5 hours.

Please note that the water source contained approximately 67kg live fish which were being fed 0.8kg fodder daily
throughout the test.
Product Information
Clarity™ has been developed in different sizes in order to accommodate the different needs of the user. For
more information about each product, please contact Koi Valley.
Item no.            Capacity          Recommended           Dimensions          Connecting tube     Koi Valley Price:          
                  (G.P.H.)          System Volume            (H/D/W) (in.)          diameter (in.)                (+S&H)

Clarity 3       To 750  GPH         To 6000 Gal             45/27/12                   1 1/2"                     $999.99

Clarity 10      To 2500 GPH        To 12000 Gal            53/33/16                 1 1/2"                   $1999.99
For best performance we recommend a high quality pump with sufficient strength to lift the required amount of
water at least to the top of the skimmer, including the height from the water level to where the skimmer is fitted.