Pond Logic® Seasonal Defense®

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Rated 5.0 out of 5, based on 3 reviews
  • One Product For 3 Seasons
  • Accelerate Debris Decomposition
  • No Mess Water Soluble Packets

Pond Logic® Seasonal Defense® is formulated for the cooler months of the season. Seasonal Defense® accelerates the decomposition of leaves, scum, and sediment that create pond muck during the fall and winter months. In the spring Seasonal Defense® replenishes winter bacteria loss, jump starts your biological filters and breaks down unwanted waste. Use Seasonal Defense® to maintain your pond through the cooler part of the season and give yourself a head start on your summer pond management.

Pond Logic Seasonal defense

Tech Specs

Usage Information

6 Packets
12 Packets
24 Packets
96 Packets
Application Packet Packet Packet Packet
Active Temp Below 50°F Below 50°F Below 50°F Below 50°F
Months Of Treatment For 1,000 Gallons 1.5 Months 3 Months 6 Months 24 Months
Shelf Life 5 Years 5 Years 5 Years 5 Years

Dosage Rates

Pond Size (In Gallons)
Seasonal Defense® (Weekly)
Up To 1,000 1 Packet
1,001 - 2,000 2 Packets
2,001 - 3,000 3 Packets
3,001 - 4,000 4 Packets
4,001 - 5,000 5 Packets

How To Apply Seasonal Defense®

Do not open packets. Add the appropriate number of water soluble packets using the dosage chart above, evenly dispersing them around your pond. Packets will dissolve when placed in the pond water.

When To Apply Seasonal Defense®

Seasonal Defense® should be used in late autumn and early spring. Autumn applications should begin when water temperatures fall below 50°F. Spring applications should begin at pond startup or just after ice melt.


When used in accordance with label directions Pond Logic® Seasonal Defense® is completely safe for fish, plants, pets and pond wildlife.


Replacement Parts

Here are the replacement parts for Pond Logic ® Seasonal Defense ® .

Weeds Treated

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

Write a review
Seasonal defense helps
May 15, 2011 | By Larry S.
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I used seasonal defense last fall and getting my pond going this spring seems like a breeze. It must have dissolved most of the leaves, there was hardly any debris. I have also used it as suggested this spring and the pond is looking great. Any thing that makes the spring cleanout easier, is worth its weight in gold!I am still getting a pond vac when I can talk my wife into it!!!

Easy To Use
May 15, 2011 | By Lisa
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Seasonal Defense works great and is easy to use. Just toss the amount of packets, as the directions state, into the water. It takes care of the guesswork.

Love it!
Nov 27, 2013 | By Bruce Rifenburg
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NY Koi pond. Having the help of PondGuy people got me clear water finally! Seasonal Defense worked perfect to clear water after a Falls remodeling. The other half of the clear water solution is Natures Defense! The warm water paks! Use both products (at the correct temps) and shazam!

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