Every lake is different, learn what works best for you.

Check your pond
Did you know?

Reducing sludge build-up in an aquatic environment can lead to increased capacity, improvements in dissolved oxygen levels, reduced nitrogen and phosphorus compounds, and improved water quality.

Cornwall Park Pond

Hastings District Council

The stream was full of anaerobic sediment and was smelly and unhealthy for both the public and wildlife. The Chinese garden pond has a concrete base and had to be regularly drained and cleaned to remove unsightly algae blooms and accumulated debris.

After 18 months of remedial treatment, the ponds and stream were restored to a safer condition and the odour eliminated. The stream is running clear and the Chinese garden pond has remained clean with a small carpet of healthy green biomass over the concrete base.

Full case study
Products and Services

Industry Leading Solutions
for Sludge Managment in Lakes and Ponds



Advance Sludge Removing Probiotic

REGEN-Sediment® is a next-generation probiotic tablet for the restoration and maintenance of impaired water resources. This advanced probiotic combines scientific research with novel bioengineering, resulting in a product that treats the entire water body by starting at the bottom. REGEN-Sediment® tablets saturate the sediment layer with rare earth stimulants and a broad spectrum of natural bacterial cultures. This establishes a healthy microbiota at the water-to-sediment interface that accelerates the digestion of organic matter.

See how it works

The Science Behind It

Backed by years of intensive study, REGEN-Sediment® has been proven to reduce organic matter and key nutrients in sludge through a study using a lab setup that more closely mimics real-life water bodies than any previous study.  Download the full study from the downloads tab below.

Laboratory Evaluation with Freshwater Replica Tanks

  • Complete metagenomic DNA analysis of sediment microbiota using the Illumina NovaSeq6000
  • Sediment volume and quantitative analysis of control and test tanks
  • Full sediment nutrient and water quality assessment
  • Testing tanks designed to mimic real water conditions, such as natural water movement and clay/sand layer


Common Uses

  • Lakes and ponds
  • Aquaculture
  • Shorelines
  • Golf courses
  • Retention ponds
  • Decorative Ponds
  • And more!


  • Removes buildup of organic matter.
  • Improves water quality and clarity
  • Restores balance to water bodies
  • Reduces internal nutrient load

Available sizes

  • 13.6 Kg Bags
IngredientsBio-vitamins, probiotics, and select bacterial cultures
DescriptionDry brown tablet
OdorEarthy odor
Stability – Activity loss<1% Loss in 6 months when stored as directed: at 24°C in a sealed container with low humidity.
Storage and HandlingStore in a cool, dry space between 10 - 27°C.


Once per month or as needed.

*Do not mix directly with algaecides or herbicides.
**If used in conjunction with algaecide or herbicide, apply after chemical treatment for best results.

Surface AcresTargeted Muck ReductionMuck Maintenance & PreventionDegradation of Floating Debris
1/42.3 – 5.7 kg1.1 – 2.8 kg0.57 – 1.7 kg
1/24.5 – 11.3 kg2.3 – 5.7 kg1.1 – 3.4 kg
19 – 23 kg4.5 – 11.3 kg2.3 – 6.8 kg
545 – 113 kg9 – 57 kg9 – 34 kg
1091 – 227 kg45 – 113 kg23 – 68 kg
100907 – 2270 kg454 – 1130 kg227 – 680 kg

Include in Treatment Programs for

  • Filamentous Algae
  • Planktonic Algae
  • Cyanobacteria
  • Muck & Sludge
  • Water Clarity
  • Nutrient Reduction
  • Aquatic Plants
  • Submerged Plants
  • Unique Issues




Liquid Products

• Creates a cleaner environment for your pond, promoting faster fish growth
• Reduces ammonia nitrogen levels
• Dissolves away organic sludge
• Seeds and maintains biological filters
• Significantly reduces noxious odours caused by dead algae and fish waste
• Reduces hydrogen sulphide, which creates strong, offensive odours
• Reduces biological oxygen demand (B.O.D.)
• Reduces buildup of bird droppings, fish feed and dead leaves
• Breaks down dead algae
• Improves dissolved oxygen levels
• Contains photosynthetic bacteria which reduces cloudy water by promoting flocculation and settling of organic and inorganic particles

The Science Behind It

One of the functions specific to achieving restoration is related to the bio-technologies capability
to biologically eliminate a primary nutrient responsible for excessive weed, algae and green water
events. This is accomplished through the denitrification process referred to as anoxic respiration, which
promotes the removal of nitrate via biological anoxic respiration that occurs within the anaerobic,
littoral and benthic zones containing accumulated organic matter.
Denitrification is a key function in our technologies capability for control of green water events and
excessive aquatic weed growth. Nitrogen removal is key to algae control, but it comprises not only
denitrification of nitrate but nitrification of ammonia to nitrate since algae can grow on both nitrogen
With nitrate as one of the primary factors and requirements for algae growth and existence, the
objective is to explain the nitrate removal process and the biological functions associated with the use
of our products allowing for a reasonable explanation of the successful control or suppression of algae.
Phosphate is another issue altogether. Some algae, like cyanobacteria, can fix nitrogen needing only
phosphate for growth, so it may be necessary to chemically and mechanically remove phosphate from
a system to permanently control algae. This is mentioned as chemical technology may be required
should phosphate levels exceed microbial cellular up-take and plant levels.


The primary and the secondary essential process to algae control involves the functions associated with
the product’s photosynthetic microorganisms. Their pathways and processes can mirror the image of
algae while the food source in the environment is depleted by the biological restoration process.
This then places microorganisms within the ecosystem in the declining or death phase where they
normally go through lysis recycling their by-product back to the environment. These released byproducts
such as carbon, nitrogen, and phosphate, all support continued biology, promoting further
algae and aquatic weed growth. Remember all algae requires is light, nutrients and Carbon Dioxide.
The novel technology incorporates photosynthetic microorganisms that can function like and mirror
the image of algae meaning they can utilize light, carbon dioxide and nutrients in place of organic
carbon (food) during the declining phase. This declining phase is where standard bio technology
(competitive biological agents) and the ecosystems indigenous microorganisms typically release
and recycle their material thereby fostering a return of algae.

The Theory Explained

These concepts apply to bacteria that can fix carbon dioxide and the non-autotrophic bacteria
important to the remediation process. These microorganisms will still be subject to starvation and
Carbon is usually not the limiting nutrient to autotrophs. The limiting nutrient is typically nitrogen,
phosphorus or a micro nutrient like iron. The autotrophs will grow until this critical nutrient is
depleted and then be subject to lysis by protozoal grazers regardless of their ability to fix carbon. At
the same time algae is almost always present in an aquatic ecosystem. Its percentage is the primary
factor that often interrupts ecosystem balance and this is dependent on available nutrients, light
and carbon dioxide. The use of our microbial technology effects the restoration process of the entire
ecosystem while improving the ratio of biological balance via denitrification and the photosynthetic
function outlined in the explanation.
The reasonable explanation is that we do not build up a high amount of nutrient-retaining biomass
(sludge) to see measurable results and this is due in-part to high substrate affinities and low growth
yield of our organisms. The substrate is primarily being catabolized to energy rather than being
converted into biomass. In comparison to the biomass of a harmful algal bloom, the contribution to
solids from our bacteria is very small. Once cells reach death phase, further mineralization will occur
during growth of surviving bacteria on lysis products.

Understanding the biological declining phase (biological death)

Lysis will continue during the final stages of ecosystem restoration until the F to M ration is achieved
and returns to a steady state. During the declining period the resulting by-product nutrients still
need to be controlled via cellular up- take of other microorganisms, denitrification, and plant
adsorption. If not, algae will return and eventually become dominant again.
Competitive biological products terminate in failure due to the inability to control the lysis that
occurs in the declining phase as food is reduced and the biological community declines and
releases their stored nutrient load.


During the initial start of biological restoration the microorganisms will take up nitrate
and phosphate as a cellular requirement thereby limiting algae and aquatic weed growth,
however once the biological enhancement process goes beyond steady-state and the food
supply is limited, the microorganisms will go into decline to match the food supply. This is
the point where our photosynthetic functions contribute with their capability to provide
unmatched restoration functions via denitrification, carbon dioxide utilization, and the use of
light energy.
Without the use of this classification of microorganisms and microbial pathways, a biological
restoration process would see good results during early use, to be followed by an increase
in green water events and aquatic weed growth as all of the nutrients removed during
the cultures log growth and through steady state would then be recycled back to the
environment due to lysis.

Our bacterial product is extremely efficient for a number of reasons and is the largest
consortium multi-strain bacteria in the industry. Unlike competitive 2-6 strain bacterial
products we offer 29 strains that handle all of the biological processes found in a waste
system whereas our competitors handle but one or two of the processes. Our bacteria
is organic and natural, completely safe and pathogen free. It has a guaranteed shelf
life of 3 years. The nature of our consortium leads to an interesting phenomenon that
is explained in its simplest form as self-selection. Because we have such a wide range
of bacteria functioning over different processes our bacteria flourishes in almost any
environment. The moment it is introduced into a system the availability of different
types of waste will encourage the growth of the specific bacteria for that type of waste.
This gives us the most successful bio- augmentation product on the market today.


Mechanical Sludge Removal

Mechanical Sludge Removal

The cost of dredging a pond or a lake is dependent on many variables. For example, costs for this sludge reduction method can come anywhere between $20,000 to $500,000 per acre!

When determining the cost of traditional dredging, there are four main questions to answer:
• How much sediment is there to dredge?
• What is the size of the water body?
• What is the content and condition of the material that needs to be dredged?
• Where can you put the dredged material once it’s removed from the lake?

To determine the quantity of sludge, a survey must be performed to provide water and sludge depth information.  At Parklink we carry out sludge surveys as a way to monitor and track progress or changes in the reduction process.  See our Sludge Surveying page.

Contact us today to discuss your situation.


Clensaqua Water Quality Kit

Clensaqua Water Quality Kit

Liquid and Powder Products

Clensaqua Solution 

The Clensaqua Water Quality kit components are 100% live, natural, non-toxic, non-chemical products which are used in conjunction to eliminate excess algae blooms, pond odours, excess
sludge and string algae in lakes and ponds (decorative, recreational and fisheries)

See how it works

The Science Behind It

The live bacteria in the Clensaqua Liquid and Sludge Bomb compete with the algae for Nitrogen (N) and
Phosphorous (P) as a food source. The Clensaqua bacteria consume N and P faster than the algae. As a
result, excess algal growth is eliminated. It is very important to note that Clensaqua does not eliminate
all algae. Some algae are needed to help keep oxygen in the water. Clensaqua helps to eliminates severe
blooms. The best way to think about it is that Clensaqua restores the natural balance in a pond, which
means a healthy mix of natural bacteria and algae living together. Through use of Clensaqua Treatment,
a pond is restored to its’ natural clarity and beauty (with a proper balance between natural bacteria and

The Clensaqua Kit digests the sludge at the bottom of a pond. This means that the risk of fish disease
is reduced and foul pond odours are eliminated. Note: Clensaqua digests organic sludge (leaves, dead
algae, fish waste, etc.). Clensaqua does not digest clay, sand or silt which is inorganic.




The Clensaqua Kit is a combination of ultra-concentrated Liquid Bacteria and powdered, slow release, Sludge Bombs.

Liquid Concentrate Bacteria.
Clensaqua liquid is an all-purpose biological pond additive specially formulated for use in fresh water ponds.
Clensaqua is super-concentrated; with an ideal mix of nitrifying and denitrifying bacteria that out-competes algae for nutrients. When used with Sludge Bomb, Clensaqua dosing is performed only once a month.

Sludge Bomb
Sludge Bombs are freeze-dried, sludge reducing bacteria and food-grade bacterial nutrients.
When placed into water, the Sludge Bomb continuously produces sludge reducing, algae-fighting bacteria for a full month.

Clensaqua (liquid) and Sludge Bombs (powder) are 100% live, natural, non-toxic, non-chemical products which are used in conjunction to eliminate excess algae blooms, pond odours, excess sludge, and string algae in lake and ponds, (decorative, recreational and fisheries).


Dose Clensaqua once a month based on the surface area:

AcresSq Metres Clensaqua Kits

How to Apply Clensaqua

Follow these guidelines to make sure you get the best results and value from Clensaqua Treatment. These three things are most important:

Clenaqua Dose Based of Surface Area:
The Clensaqua dose is one box (Kit) per month (which means 3.8 litres of liquid, and one Sludge Bomb) for every ¼ acre of pond surface area with a problem. Dose Clensaqua and Sludge Bombs at the same time, once a month. Clensaqua provides maximum rapid action, while Sludge Bombs work throughout the month to maintain the required level of activity. Apply most of the Clensaqua Liquid where problems exist. Simply throw the Sludge Bomb where the problems are greatest. Remember, the dose is based on the surface area of the pond having problems (not the entire surface of the pond, unless the whole pond has a problem). If you have a 2 acre pond, but only have a problem in one end, with half an acre surface area, then use the dose for ½ acre.

Double the Dose for Ponds with Severe, Long-standing Problems:
Some ponds that have had severe problems over the long term should be treated initially with a double dose. The extra dose will speed the results and will almost always overocome even the most difficult algae problems, within 2 to 4 months of double application.
In many cases, a single month with double dosing will overcome the otherwise persistent problems. Once the problem is solved, revert to the standard dose to maintain a beautiful, healthy pond.

Apply the Product where Problems are Most Severe:
In nearly all lakes and ponds the majority of the unsightly problem occurs along the shore line, or at one end of the pond or the other. Sludge build up, however, may be present throughout the pond base, so it is difficult to precisely assess where the problems originated from without doing extensive and expensive testing.
However, our experience shows that dosing around the pond periphery and only in problem areas is completely suitable. The natural diffusion of liquid Clensaqua from the shorline to the centre of the pond  will be assisted by normal wind action and natural mixing.
If you have an unusual situation, such as a lake with severe odour (sulphide) problems, you should base your dose on the entire pond surface area, and then distribute the product throughout the pond. But in the vast majority of the real world situations, you can simply dose the Clensaqua around the shore of the pond, adding more product where problems are most severe.
Similarly, position the Sludge Bombs around the pond where the algae problems and/or weed problems are most severe. This approach will minimize labour and produce excellent results nearly all of the time

When Should You Begin and End Clensaqua Treatment?
It is best to wait until the pond is at least 7° C or warmer before beginning with Clensaqua. Treatment can continue throughout the spring, summer and autumn. Once the water temperature drops below 7° C, there is little value in continuing treatment.
You can begin treating a problem pond at any time, assuming that you consider the temperatures noted above. You can begin before a problem begins and prevent it or begin after even a severe bloom and solve the problem (though this may require a double dose for a few months).

How Should Clensaqua Liquid and Sludge Bombs Be Applied?
Shake the bottle before use. Dose the liquid Clensaqua around the periphery of the pond where the problems are worst. For best results mix the proper dose of Clensaqua with several times that volume of pond water then distribute this mixture around the pond periphery.
Apply most of the liquid to the zones where the algae, sludge or odour problems are most severe. It is often best to choose 4 or more dosing points (more dosing points for larger ponds) Otherwise, let normal wind action and natural mixing distribute the product.
Similarly, throw the Sludge Bombs into the pond where problems are most severe. Repeat monthly during typical warm sunny seasons.

Pond and Lake Maintenance Guide Using Clensaqua