API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container
$23.65
Price: $23.65
(as of Oct 22, 2025 06:13:28 UTC – Details)
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.
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
Best Sellers Rank: #4,319 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #9 in Water Garden & Pond Treatment
Customer Reviews: 4.2 4.2 out of 5 stars 4,779 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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
Customers say
Customers find the pond cleaner effective at clearing water and eliminating sludge, with one noting it works particularly well after winter. The product is easy to use, requiring no scrubbing, and keeps fish healthy without harming them. While some customers consider it a great value, others find it expensive. There are mixed experiences with fish death rates, with some reporting significant losses.
13 reviews for API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container
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sandyliz –
This worked great!!
I have a small 155 gallon pond. My two goldfish had babies and now the pond seems to be getting dirty sooner plus had an excess of algae. Within two days of the first use, the pond was clear! And my fish seemed completely unbothered. I have put it in a time or two since for maintenance and so far so good. Great product!!
Rosie –
keeping my pond very clean
I use this and the algae fix and between the two I have noticed a huge improvement. This more than the algaecide definitely. Iâve had the pond 10 years and this is the first year the algae is actually slowly coming off the sides and bottom. Itâs literally a 7 x 15â concrete hole in the ground next to the front door with a waterfall and fountain. Itâs gorgeous and I put a lot of effort into keeping up with the algae. I have probably 100 fish in there so between uneaten food and waste.. the algae and buildup around the ornaments is just nuts. I mean I could probably get away with less upkeep, but I enjoy interacting with the bigger cichlids and itâs a nice quiet time for me. The ornaments always get caked with algae no matter what. And the rocks and waterfall, too. This doesnât really help that thick black algae that builds up on the rocks. API makes a waterfall oxi powder but iâm too scared to use it bc iâve seen reviews saying all their fish died. I may get it and use it on smaller rocks outside of the pond but not in it. Anyway this mainly just keeps the floor and side walls clean. Water too obviously but knock on wood the water has been consistently clean for quite a few years. Iâm pretty much just referring to the constant fish waste and algae buildup around the ornaments and in general. Iâve noticed im starting to actually see the cement instead of one thick green blanket up to the water line. The plecos are starting to eat more fish food bc of the significantly lower algae count. Overall iâve noticed a huge reduction in algae since adding this to my pond maintenance schedule. Itâs June now so iâm sprinkling a little bit in every other day and algaefix every 3 days. Iâm in Florida and this will probably go on till October when the heat and sun let up a bit. But this is huge volume and the first tub lasted almost a whole year of constant use. Good stuff.
cam t. –
it work
it slow clear the pond water.
Helga –
… 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.
John bastian –
Duck
Not goud for ducks
George Elliott –
works
Works good…
David P Belt –
Not pleased with product pacaging or performance…
Did not appear to work as advertised. Pond was not especially bad however I did want to see clearer water. Had a lot of fine floating debris. I have been using product as instructed and am noticing absolutely no difference whatsoever. Clarity has not improved one bit. I feel like I wasted y money. I also don’t trust products with no factory security such as Styrofoam seal under the cover or the top sealed with plastic.
KidD –
It seems to work well!
This stuff seams to work well and it hasn’t harmed/killed my Koi yet, so that’s a plus. I have an 800 gallon Koi pond with six Koi in it. I started using this about a month ago when I brought my pond out of winter hibernation. The water was pretty green last month. I initially went with half the dosing than prescribed because you can never be too cautious with some of this stuff even when they say they’re “fish safe”. I monitored the behavior of my fish for about a week and started increasing dosing. So far so good. About a month later, my water is crystal clear and my fish seem happy. I will continue to use this product along with a liquid-based natural bacteria product that I use as well.
Michael Bloomfield –
Bought this for my new wildlife pond. Really cleared up the sludge that had built up of its first summer. Water is crystal clear and does not smell of stagnation anymore. Highly recommend.
Delphinium Blue –
Very happy with this exceptionally easy to use product. Very happy that pond is starting to look better
Cameron Robertson –
A little goes a long way. We add it and by the third say the water is crystal clear. We’ve used it a few time overthe year and it’s amazing
Lois –
Very good, did on excellent job on my swimming pool converted to koi pond ( still 5′ deep) very happy with this product
Sen Sen –
Doesn’t work. Koi eating it all up, my clear pond water suddenly all murky and covered with brown scum.