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API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container

4.3 4.3 out of 5 stars 3,701 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Water Garden & Pond Treatment by API

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Available at a lower price from other sellers that may not offer free Prime shipping.
1-Pound
Pond Cleaner

Purchase options and add-ons

Brand API
Item Weight 1 Pounds
Item Form Stick
Target Species Fish
Allergen Information Apple Free

About this item

  • Contains one (1) API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container
  • Contains natural active ingredients to break down fish waste and consume pond sludge
  • Breaks down dead algae and digests leaves and grass clippings
  • Helps to reduce overall pond maintenance and keep pond clean
  • Use twice a week for two weeks in ornamental ponds for start-up, end of season, then once every two weeks for regular maintenance

Customer ratings by feature

Easy to use
4.3 4.3
Style
3.9 3.9
Sheerness
3.7 3.7
Value for money
3.6 3.6

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From the manufacturer

pond care fresh freshwater well tap water solution chemical supply product liquid treats gallons api
fish koi goldfish catfish wildlife plants garden backyard outdoor ornamental mini healthy api

Why be proactive with water treatments?

A natural pond has a constant supply of fresh water flowing into it, such as from a stream or spring. Water also flows out of a natural pond, taking fish waste and other toxins with it. This isn’t true for most garden ponds as they are closed systems. Garden ponds also tend to be much smaller than natural ponds, so they do not offer the amount of water per fish that you find in nature. For these reasons, water treatments are necessary to keep water conditions safe for both fish and plant life and for clearer water.

Following specific steps each season allows you to create a backyard retreat you’ll enjoy all year long! For more information about what’s needed each season, check out more below.

Spring Start Up - Get Your Pond Ready!

It's pond startup time! Whether filling a new pond or re-establishing an existing pond, following some simple steps at startup will yield benefits you’ll enjoy all season long. The 3 key steps that must be taken are making your tap water safe, activating the natural pond cycle, and maintaining sparkling clean water to boost fish and plant health. Once the water temperature reaches above 42⁰F, you’ll also want to start feeding your fish again. It is important to take care of all of your plants in the spring with API AQUATIC PLANT FOOD TABLETS as they will be the key to success in most ponds! Lastly, monitor the water conditions in your pond with the API POND MASTER TEST KIT, an easy and accurate way to test 4 key water parameters including pH, ammonia, nitrite, and phosphate.

master pond water test tester kit for ammonia nitrite nitrate phosphate ph balance heavy metals prob algaecide control destroy gone stop reduce string hair blooms blanket safe for fish koi wildlife pla control clear treatment for gardens plants fish remover treats gallons koi product liquid bottle slu solutions clean and clear bacterial cleaner waste reducer remover all natural safe remover treats gallons sludge muck dirt slime eliminate consumes degrades waste bacteria barley conditioner chlorine dechlorinator coat treatment for fish remover gallons koi scales skin tissue li
API POND MASTER TEST KIT API POND ALGAEFIX API POND ACCU-CLEAR API POND ECOFIX API POND-ZYME API POND STRESS COAT
Customer Reviews
4.7 out of 5 stars
2,280
4.4 out of 5 stars
4,580
4.4 out of 5 stars
411
4.3 out of 5 stars
2,636
4.3 out of 5 stars
3,702
4.8 out of 5 stars
3,101
Use Weekly Helps monitor water quality Quickly clears pond water
Use Every 2 Weeks Breaks down sludge Consumes pond sludge to keep it clean
Use When Adding or Changing Water Makes tap water safe for fish
Treatment Season Spring - Autumn Spring - Autumn Spring - Autumn Summer & Autumn Summer & Autumn Spring - Autumn
pond clear pond cleaner pond clarifier pond bacteria fish pond pond barley bales pond foam

Making A Better Underwater World

At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. For over 50 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 4 x 3.5 x 6.5 inches; 1 Pounds
  • Manufacturer recommended age ‏ : ‎ 1 month and up
  • Item model number ‏ : ‎ 146B
  • Department ‏ : ‎ Pond
  • Date First Available ‏ : ‎ October 2, 2003
  • Manufacturer ‏ : ‎ Mars Fishcare
  • ASIN ‏ : ‎ B000OVCI2S
  • Country of Origin ‏ : ‎ USA
  • Customer Reviews:
    4.3 4.3 out of 5 stars 3,702 ratings

Looking for specific info?

Product Description

API POND-ZYME SLUDGE DESTROYER Pond Water Cleaner with Barley reduces build-up of fish waste and consumes pond sludge, which is typically a build-up of organic matter that degrades water quality and clogs pumps and filters. POND-ZYME SLUDGE DESTROYER uses natural bacteria and barley as active ingredients to break down algae and fish waste, digest leaves and grass clippings, and reduce overall pond maintenance for the season. This product is exclusively for use in ornamental ponds. Use as directed, dosing twice a week for two weeks at the beginning of the spring start-up season and at the end of the season, and dosing once every two weeks for regular maintenance. With API POND products, it’s easy to keep a beautiful pond. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as koi, catfish, perch, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.

Important information

Safety Information

Please Read Instructions Before Use

Ingredients

Nonpathogenic Bacterial Cultures.

Directions

API POND-ZYME SLUDGE DESTROYER Pond Water Cleaner with Barley reduces build-up of fish waste and consumes pond sludge, which is typically a build-up of organic matter that degrades water quality and clogs pumps and filters. POND-ZYME SLUDGE DESTROYER uses natural bacteria and barley as active ingredients to break down algae and fish waste, digest leaves and grass clippings, and reduce overall pond maintenance for the season. This product is exclusively for use in ornamental ponds. Use as directed, dosing twice a week for two weeks at the beginning of the spring start-up season and at the end of the season, and dosing once every two weeks for regular maintenance. With API POND products, it’s easy to keep a beautiful pond. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as koi, catfish, perch, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. Contains natural active ingredients to break down fish waste and consume pond sludge Breaks down dead algae and digests leaves and grass clippings Helps to reduce overall pond maintenance and keep pond clean Use twice a week for two weeks in ornamental ponds for start-up and end of season, then once every two weeks for regular maintenance Contains one (1) API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container Treats up to 16000 gallons

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API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container
API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container
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Price-33% $30.01
List:$44.98
-41% $34.50
List:$58.78
-29% $68.97
List:$96.98
$29.99$59.99
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Easy to use
4.3
4.3
4.1
4.6
4.6
Value for money
3.6
3.7
3.5
3.9
4.0
Sheerness
3.7
3.6
3.5
4.1
Style
3.9
2.6
4.1
Scent
3.3
3.3
3.9
Sold By
Amazon.com
Seven Rivers Digital
Seven Rivers Digital
Bluewater Chemgroup
Airmax, Inc.
target species
Fish
Fish
Fish
Fish
Fish
liquid volume
0 gallons
128 fluid ounces
1 gallons
1 gallons
1 gallons
form
Stick
Liquid
Liquid
Gel
Liquid
weight
1 pounds
4 pounds
8.25 pounds
8.39 pounds
1 pounds

Customer reviews

4.3 out of 5 stars
4.3 out of 5
3,702 global ratings

Customers say

Customers like the quality, performance, and clarity of the pond enzyme. For example, they mention that it works well, the fish and turtles are safe and happy, and that it doesn't bother the fish or the plants. That said, opinions are mixed on value, algae, and sludge.

AI-generated from the text of customer reviews

263 customers mention199 positive64 negative

Customers like the performance of the pond enzyme. They say it works well, is incredible, and is very happy with the results. Some say that it works great in their garden pond and that it gets rid of sludge pretty quickly.

"...I feel the next two doses will eliminate that. This stuff is amazing! So glad I gave it a try and I'll continue to use it." Read more

"...Anyway, I think this works pretty well, with all the issues it is much clearer than I anticipated it being today...." Read more

"...Update: Two years later I am still using this product and am very happy with the results...." Read more

"Does not work as stated, but does work somewhat." Read more

149 customers mention126 positive23 negative

Customers like the clarity of the liquid barley extract. They say it works well for keeping pond water clear. Some say that it clears their pond within a day or two.

"...It has only been 6 days and my water is clear and I can see the bottom of the pond. The best part is that I can see my fish happily swimming around...." Read more

"Update- I didn't need to wait a few more days, my pond is now totally clear. Will keep using this along with the algaecide...." Read more

"...stay in the habit of adding a scoop or two twice a week the pond stays nice and clear...." Read more

"Easy to use and cleared my small water garden with two applications...." Read more

50 customers mention39 positive11 negative

Customers like the quality of the product. They say it does not harm fish, and is safe for plants and fish. Some mention that it does the job advertised, and that their fish and turtles are happy.

"...The best part is that I can see my fish happily swimming around...." Read more

"...I have fish in my pond and I love the fact that it is safe for them...." Read more

"...The smell is gone, my water is clear and the fish are happy. I will be adding this to my maintenance regimen." Read more

"I had high hopes bc of the reviews but unfortunately it made no difference in my pond. Maybe it works for smaller ponds of water?..." Read more

24 customers mention20 positive4 negative

Customers find the product easy to use and effective. They say the premeasured, water soluble pouches are easy to toss in. Customers also appreciate the complete and easy directions. Overall, customers are happy with the product's ease of use and recommend it to others.

"Easy to use but kinda expensive and it really did not seem to work all that well in my pond. But maybe it's just me." Read more

"Easy to use and cleared my small water garden with two applications...." Read more

"Easy and fast. Minimal cost per dose." Read more

"...This is an excellent product. The premeasured, water soluble pouches are easy to use and very effective." Read more

8 customers mention6 positive2 negative

Customers like the condition of the outdoor living product. They say it's a steady product, and the benefits seem to last a couple weeks.

"...I notice results within 48 hours and the benefits seem to last a couple weeks...." Read more

"...Never had to do more than 2 treatments in a month so it lasts quite a while for me." Read more

"Bottle lid was broken and contents spilled in box" Read more

"...Steadfast product." Read more

82 customers mention53 positive29 negative

Customers are mixed about the sludge. Some mention that it really cleaned up the pond s s, and makes it look super. However, others say that it was the worst scrubbing product ever, and didn't reduce algae.

"...I can clearly see the bottom (5-1/2 feet) and have minimal problems with algae and muck...." Read more

"...There is still some sludge around the sides and bottom but nothing like what was there. I feel the next two doses will eliminate that...." Read more

"...I have noticed a big difference in our koi pond. The sludge is practically gone." Read more

"I am able to see my Koi Fish thanks to this product. My pond is cleaner than ever!" Read more

47 customers mention25 positive22 negative

Customers are mixed about the value of the product. For example some mention it's great value, affordable for how well it works, and absolutely worth the money, while others say that it'd be a waste of money.

"...I like ordering from Amazon because of the free shipping and it is less expensive." Read more

"Easy to use but kinda expensive and it really did not seem to work all that well in my pond. But maybe it's just me." Read more

"Easy and fast. Minimal cost per dose." Read more

"...However, the cost for all three is expensive." Read more

42 customers mention21 positive21 negative

Customers have mixed opinions about the algae in their pond. Some mention that it helps control algae, while others say that it makes the water super green with suspended algae.

"...It really does help to keep the algae and muck in control. I now use two to four scoops per week for my 4,500 gallon pond...." Read more

"...hosed out the filters and one thing I noticed is that the gunk in them is darker brown in color than usual...." Read more

"...This is a great product as once it is used as directed, the algae was immediately pushed towards the center of the pond where I was able to..." Read more

"...The water became very green and my fish were suffocating… I kept adding water and filtering but to no avail...." Read more

... year I found and used an algeacide that worked like a charm for my little backyard pond
5 Stars
... year I found and used an algeacide that worked like a charm for my little backyard pond
Update- I didn't need to wait a few more days, my pond is now totally clear. Will keep using this along with the algaecide.Last year I found and used an algeacide that worked like a charm for my little backyard pond. It kept it free of algae all summer long, which was a first for me. It is starting to warm up, so I used my tried and true again and my pond kept getting progressively greener. It wasn't working at all.I drained my pond, refilled, then drained and refilled again and hit it hard with the algae control. Still looking terrible. I ordered this and put in the first dose. The first thing I noticed is this floats on the surface for a long time before it sinks and I was worried it wouldn't do much. That night we had a bad wind storm and one of my potted plants ended up in the pond. Great, even more mess. I netted out all the debris I could and figured I'd have to drain and refill this week.This morning I go out, and though all the algae isn't quite gone yet, it is much less so. The water is still a bit murky, but I can see the bottom. With the algae as bad as it was, then the wind storm, I figured it would be a total disaster and it isn't. I think due to this product. I removed and hosed out the filters and one thing I noticed is that the gunk in them is darker brown in color than usual. I think this is the waste and stuff coming out. I gave it a second dose today and hope that within the next few days it is back to normal. It is only going to get hotter, I need to control it now. Anyway, I think this works pretty well, with all the issues it is much clearer than I anticipated it being today. I will continue using and update my review.
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Top reviews from the United States

Reviewed in the United States on June 20, 2022
Size: 1-PoundStyle: Pond CleanerVerified Purchase
18 people found this helpful
Report
Reviewed in the United States on May 1, 2017
Size: 1-PoundStyle: Pond CleanerVerified Purchase
Customer image
5.0 out of 5 stars ... year I found and used an algeacide that worked like a charm for my little backyard pond
Reviewed in the United States on May 1, 2017
Update- I didn't need to wait a few more days, my pond is now totally clear. Will keep using this along with the algaecide.

Last year I found and used an algeacide that worked like a charm for my little backyard pond. It kept it free of algae all summer long, which was a first for me. It is starting to warm up, so I used my tried and true again and my pond kept getting progressively greener. It wasn't working at all.

I drained my pond, refilled, then drained and refilled again and hit it hard with the algae control. Still looking terrible. I ordered this and put in the first dose. The first thing I noticed is this floats on the surface for a long time before it sinks and I was worried it wouldn't do much. That night we had a bad wind storm and one of my potted plants ended up in the pond. Great, even more mess. I netted out all the debris I could and figured I'd have to drain and refill this week.

This morning I go out, and though all the algae isn't quite gone yet, it is much less so. The water is still a bit murky, but I can see the bottom. With the algae as bad as it was, then the wind storm, I figured it would be a total disaster and it isn't. I think due to this product. I removed and hosed out the filters and one thing I noticed is that the gunk in them is darker brown in color than usual. I think this is the waste and stuff coming out. I gave it a second dose today and hope that within the next few days it is back to normal. It is only going to get hotter, I need to control it now. Anyway, I think this works pretty well, with all the issues it is much clearer than I anticipated it being today. I will continue using and update my review.
Images in this review
Customer image
Customer image
54 people found this helpful
Report
Reviewed in the United States on February 13, 2024
Size: 1-PoundStyle: Pond CleanerVerified Purchase
Reviewed in the United States on September 14, 2014
Size: 1-PoundStyle: Pond CleanerVerified Purchase
126 people found this helpful
Report
Reviewed in the United States on September 11, 2023
Size: 1-PoundStyle: Pond CleanerVerified Purchase
2 people found this helpful
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Reviewed in the United States on October 18, 2023
Size: 1-PoundStyle: Pond CleanerVerified Purchase
Reviewed in the United States on January 1, 2024
Size: 1-PoundStyle: Pond CleanerVerified Purchase
Reviewed in the United States on May 5, 2022
Size: 1-PoundStyle: Pond CleanerVerified Purchase
3 people found this helpful
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Top reviews from other countries

The peak is unusually long
5.0 out of 5 stars Best product out there
Reviewed in Canada on June 30, 2023
Size: 1-PoundStyle: Pond CleanerVerified Purchase
One person found this helpful
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Brian
5.0 out of 5 stars great sludge gulper
Reviewed in the United Kingdom on June 10, 2019
Size: 1-PoundStyle: Pond CleanerVerified Purchase
2 people found this helpful
Report
Lois
4.0 out of 5 stars Excellent product!
Reviewed in Mexico on May 9, 2017
Size: 1-PoundStyle: Pond CleanerVerified Purchase
Customer image
Lois
4.0 out of 5 stars Excellent product!
Reviewed in Mexico on May 9, 2017
Very good, did on excellent job on my swimming pool converted to koi pond ( still 5' deep) very happy with this product
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Customer image
Sen-Sen
1.0 out of 5 stars One Star
Reviewed in India on April 5, 2016
Size: 1-PoundStyle: Pond CleanerVerified Purchase
William
5.0 out of 5 stars Very effective
Reviewed in Canada on June 20, 2022
Size: 1-PoundStyle: Pond CleanerVerified Purchase