SET-L Logs

Overview | How It Works | Best Use | How to Use | Limitations | FAQs

Water Clarification Overview

SET-L Logs are slow-dissolving water clarification logs designed for moving water where suspended sediment is being carried into places you do not want it.

Their main job is to intercept muddy, sediment-laden flow and help drop suspended solids before those solids spread farther into a pond, lake, basin, ditch, or discharge path.

Position where water movement is already concentrating suspended material, such as drainage ditches, watershed inflow points, around aeration-related circulation, beneath fountain flow, in stormwater movement paths, and in other places where sediment is actively being transported.

SET-L Logs are also used upstream of ponds and lakes to reduce the amount of suspended clay and associated nutrient-bearing sediment entering the main water body. By treating water before sediment settles in the pond itself, they can help reduce recurring turbidity pressure and reduce the amount of incoming material that contributes to murky water.

Each package contains 4- 10 lb logs, for a total weight of 40lbs. Shelf life of 5 years when stored properly.

How This Water Clarification Product Works

Once submerged, each SET-L Log dissolves slowly into moving water. As that water passes over and around the log, the active polymer enters the water column at a controlled rate. That treated water then begins binding very fine suspended particles together into larger, heavier clumps.

Those larger clumps settle more easily than free-floating clay and fine suspended solids. In practical terms, that means the water can begin losing the haze, cloudiness, and suspended load that make ponds, lakes, ditches, and inflow areas look muddy.

SET-L is especially useful where the problem is ongoing inflow or circulation-driven transport of suspended clay. Instead of waiting for suspended material to move deeper into the pond, the log is placed where the moving water can contact it first. That allows clarification to happen where the sediment is still in motion.

When suspended solids are removed from the water column, some attached nutrients are removed with them as those particles settle. In ponds where incoming runoff is carrying fine sediment, that can help reduce the amount of phosphorus and other unwanted nutrient-bearing material reaching the main pond basin.

This is important because suspended solids do more than make water look dirty. They also create conditions that support continued water quality problems. When that suspended load is reduced, the water often becomes easier to manage and clearer over time, especially when the main source of turbidity is sediment entering from the watershed or being kept in motion by circulation.

Best Use Cases

• Watershed inflow points where muddy runoff is entering a pond or lake
• Ditches, channels, and conveyance areas where moving water is carrying sediment downstream
• Around aeration stations where water movement keeps suspended material circulating
• Stormwater applications where suspended solids need to settle before reaching a receiving pond or basin
• Mine tailings or similar industrial water movement situations where suspended sediment control is needed
• Ponds with repeated clay-based turbidity where targeted placement can treat water where it is moving most predictably
• Small ponds and larger ponds with multiple circulation points, where multiple logs can be positioned based on actual flow paths

One 10lb log used per 450,000 to 500,000 gallons of water, and up to about 1,000,000 gallons in maintenance conditions. In real use, placement and water movement matter more than raw pond volume alone, because the product works best where water repeatedly passes the log.

For very small ponds and smaller bodies of water, please call for more information. 

How to Use This Product

Start by identifying where suspended sediment is moving, not just where the water looks dirty. SET-L Logs should be placed where water flow will repeatedly contact the log. Good placement is usually near incoming runoff, in ditches, near discharge paths, under moving water features, or near circulation patterns that keep sediment in suspension.

Common placement methods described for this product include setting logs in ditches, hanging them over aerators, positioning them under balloons, dragging them by a decoy in moving water situations, placing them in fountain-related flow, or staking them in watershed areas that deliver heavy solids into the pond. Some users place them inside sediment socks or similar containment setups where runoff repeatedly passes through the treatment area.

Submerge the log so moving water can contact it consistently. The goal is not simply to sink the log anywhere in the pond. The goal is to expose it to predictable flow. If water is not moving over the log, treatment performance can be slow, inconsistent, or limited to a very small area.

Use one 10 lb log for approximately 450,000 to 500,000 gallons as a starting rate where active clarification is needed. In ponds with high turbidity, stronger sediment loading, or multiple active flow paths, some choose to run two logs in separate locations so more than one movement zone is being treated.

Expect the log to dissolve slowly over time rather than all at once. One SET-L Log may last up to approximately 6 months in operation, but actual life is site specific. Faster flow, higher turbidity, and more constant contact with suspended solids can shorten that lifespan. Slower, lighter-duty conditions may extend it.

Monitor the treatment area during use. If the main inflow path changes after rainfall, aeration pattern changes, or seasonal water level shifts, repositioning may be needed so the log remains in moving water. Replace logs as they dissolve and as site conditions require.

Store unopened product in a dry location within the stated 30-90 degrees F storage range. Keep the product sealed until use.

Limitations and Misuse Scenarios

SET-L Logs are not a cure-all for every cause of dirty water. They are most appropriate where suspended sediment is the main reason the water is cloudy and where water movement can carry treated water through the problem area. If murky water is being caused primarily by dense algae bloom, dissolved color, bottom-feeding fish activity, shoreline erosion, or constant bottom disturbance, results may be limited unless those causes are also addressed.

This product also depends heavily on placement. Dropping a log into still water or into an area with poor contact between the log and the moving water will reduce performance. A pond may be large, but if only one small area of the pond is actually moving water over the log, only that part of the water movement pattern is being treated.

Longevity is pond specific. Log life depends greatly on how water is moving over the logs and how turbid that water is. In high-load runoff events or very dirty inflow zones, a log may be consumed faster than in lighter-duty maintenance conditions.

Do not assume one log will correct severe turbidity everywhere in a large pond if the pond has multiple inflows, several separate circulation zones, or widely distributed sediment sources. In those cases, multiple treatment points may be more effective than relying on a single placement location.

This product should also not be treated as a substitute for sediment-source control. If watershed erosion, unstable ditch banks, livestock access, construction runoff, or repeated upstream disturbance are continually feeding solids into the water, clarification may help manage the symptom but will not remove the source of the problem.

Frequently Asked Questions

Will SET-L Logs work in all ponds or lakes?

No. They are best suited to ponds, lakes, ditches, and treatment points where suspended sediment is being carried by moving water. They are not equally effective in every muddy-water situation. The better the fit between the product and the actual cause of turbidity, the more predictable the outcome.

Where should I place the logs for best results?

Place them where water is already moving suspended solids. Typical examples include ditch flow, watershed inflow points, around aerators, beneath fountain-related movement, or other concentrated flow paths. Placement is one of the biggest factors in whether the product performs well.

How long does one log last?

One log may last up to about 6 months in operation. Actual longevity depends on how much water moves over the log and how much suspended material that water is carrying. Heavier turbidity and stronger flow usually shorten the service life.

How much water does one log treat?

One 10 lb log treats about 400,000 to 450,000 gallons under active use, with a typical starting rate of roughly one log per 450,000 to 500,000 gallons.

In maintenance situations, up to about 1,000,000 gallons may be supported. 

Can I use more than one log?

Yes, especially where a pond has multiple circulation zones, several inflow areas, or high turbidity. The supplied notes indicate some users place two logs in separate locations so they can treat more than one active movement area at the same time.

What are the most common reasons this product underperforms?

The most common reasons are poor placement, low water contact, using it for the wrong type of turbidity problem, expecting one treatment point to handle multiple separate inflow zones, and failing to control the upstream source of sediment. This product performs best when it is placed directly in the path of moving, sediment-laden water.

What if my pond is very small?

Please contact us for more information

I do not know the size of my pond, how do I determine this?

Feel free to reach out to our Pond Experts:

• [email protected]
• By phone at 877-493-7660
• Chat with us below
• or visit https://mypond.naturalwaterscapes.com/ to map out your pond.