TetraPond® Sludge Reducer

$8.99–$39.99
  • Reduce Buildup of Organic Debris
  • 2 Easy Dosing Options
  • Great for Ponds with Gravel Bottoms

TetraPond® Sludge Reducer is an all-natural product. The beneficial bacteria and enzyme blend breaks down organic debris and improves water clarity. It is safe for fish, plants and people. For best results, TetraPond® Sludge Reducer should only be used when water temperatures are above 50°F.

Tech Specs

Usage Information

TetraPond(r) Sludge Reduce - 4 Pack Blocks
4-Pack Blocks
TetraPond(r) Sludge Reduce - 16 Ounce
16 Ounce
TetraPond(r) Sludge Reduce - 40 Ounce
40 Ounce
Application Dissoluble Block Powder Powder
Active Temp (Best Results) 50°F 50°F 50°F
Months of Treatment For 1,000 Gallons 1 Month 8 Months 20 Months

Dosage Rates - Powder

Pond Size
Startup (Weekly-4 Weeks)
Maintenance (Every 2 Weeks)
Shutdown (Weekly-4 Weeks))
500 Gallons 1 Ounce 1/2 Ounce 1 Ounce
1,000 Gallons 2 Ounce 1 Ounce 2 Ounce
2,000 Gallons 4 Ounce 2 Ounce 4 Ounce


Please note: The above are recommendations, please read and follow all label instructions.

How To Apply - Powder

Sprinkle this nontoxic powder uniformly on the water's surface along the edges of the pond.

When To Apply - Powder

For best results, apply in early spring or when you pond water temperature is above 50°F. After startup dosage, apply for 2 weeks at the given doses or as needed.

Dosage Rates - Block

Pond Size
Startup (Weekly-4 Weeks)
Maintenance (Every 2 Weeks)
Clean Dirty Ponds (Weekly-4 Weeks)
250 Gallons 1 Block 1 Block 1 block
500 Gallons 2 Blocks 2 Blocks 2 Blocks
1,000 Gallons 4 Blocks 4 Blocks 4 Blocks


Please note: The above are recommendations, please read and follow all label instructions.

How To Apply - Block

Drop the block(s) into your pond. If using more than 1, they can be placed in different places.

When To Apply - Block

For best results, apply in early spring or when you pond water temperature is above 50°F. After startup dosage, apply every month at the given doses or as needed.

Replacement Parts

Here are the replacement parts for TetraPond ® Sludge Reducer.

Weeds Treated

The first step towards effectively treating any pond weed is proper identification. TetraPond® Sludge Reducer is recommended for use against each of the weeds listed below. Click on your desired weed for more information and alternate control options.

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