---
product_id: 38121295
title: "POND-ZYME SLUDGE DESTROYER (8 oz) Pond Cleaner with Natural Pond Bacteria - Up to 8,000 Gallons - Reduces Fish Waste Buildup - Consumes Muck & Sludge - Spring Start Up & Regular Care"
brand: "api"
price: "¥7349"
currency: JPY
in_stock: true
reviews_count: 13
category: "Api"
url: https://www.desertcart.jp/products/38121295-pond-zyme-sludge-destroyer-8-oz-pond-cleaner-with-natural
store_origin: JP
region: Japan
---

# Breaks down algae & organic waste Cleans up to 8,000 gallons Natural bacteria formula POND-ZYME SLUDGE DESTROYER (8 oz) Pond Cleaner with Natural Pond Bacteria - Up to 8,000 Gallons - Reduces Fish Waste Buildup - Consumes Muck & Sludge - Spring Start Up & Regular Care

**Brand:** api
**Price:** ¥7349
**Availability:** ✅ In Stock

## Summary

> 🌊 Transform your pond into a crystal-clear oasis—because your fish deserve the best!

## Quick Answers

- **What is this?** POND-ZYME SLUDGE DESTROYER (8 oz) Pond Cleaner with Natural Pond Bacteria - Up to 8,000 Gallons - Reduces Fish Waste Buildup - Consumes Muck & Sludge - Spring Start Up & Regular Care by api
- **How much does it cost?** ¥7349 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/38121295-pond-zyme-sludge-destroyer-8-oz-pond-cleaner-with-natural)

## Best For

- api enthusiasts

## Why This Product

- Trusted api brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual-Phase Action Plan:** Use twice weekly for two weeks during seasonal start-up, then biweekly for ongoing clarity and health.
- • **Eco-Powered Pond Purifier:** Harnesses natural bacteria and barley to dissolve sludge and fish waste, keeping your pond pristine without harsh chemicals.
- • **Trusted Aquatic Innovation:** Backed by 60+ years of API expertise, ensuring reliable, research-driven pond care solutions.
- • **Safe Sanctuary for Wildlife:** Formulated to protect your fish, pets, and local ecosystem while reducing muck and algae buildup.
- • **Massive Coverage, Minimal Effort:** One 8 oz bottle treats up to 8,000 gallons, making maintenance effortless for large ornamental ponds.

## Overview

API POND-ZYME SLUDGE DESTROYER is an 8 oz natural pond cleaner that uses active bacteria and barley to break down fish waste, algae, and organic sludge. Designed for ornamental ponds up to 8,000 gallons, it reduces maintenance by digesting muck and debris safely, promoting a healthy aquatic environment. Trusted for over six decades, API’s formula supports clear water and thriving fish with easy seasonal and regular dosing.

## 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 over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your pond. API POND Pond Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as koi, catfish, perch, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your pond. Make sure to use all products as directed in order to ensure the best results.

Review: Great for my pond - Best I’ve found to kill string algae and control my pond. Water stays clear. Red eared slider is happy. Fish are thriving. Totally worth it and I’ll be using this forever.
Review: 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. I’ve had the pond 10 years and this is the first year the algae is actually slowly coming off the sides and bottom. It’s literally a 7 x 15’ concrete hole in the ground next to the front door with a waterfall and fountain. It’s 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 it’s a nice quiet time for me. The ornaments always get caked with algae no matter what. And the rocks and waterfall, too. This doesn’t really help that thick black algae that builds up on the rocks. API makes a waterfall oxi powder but i’m too scared to use it bc i’ve 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. I’m pretty much just referring to the constant fish waste and algae buildup around the ornaments and in general. I’ve 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 i’ve noticed a huge reduction in algae since adding this to my pond maintenance schedule. It’s June now so i’m sprinkling a little bit in every other day and algaefix every 3 days. I’m 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.

## Features

- API POND-ZYME SLUDGE DESTROYER – Contains natural active ingredients to break down fish waste and consume pond sludge with natural bacteria for ponds.
- Fast and Effective – This pond muck and sludge remover breaks down dead algae and digests leaves and grass clippings.
- Safety First – Our pond sludge remover helps to reduce overall pond maintenance and keep ponds clean while being safe for pets and surrounding wildlife.
- How to Use – Use twice a week for two weeks in ornamental ponds for start-up or end of season, then once every two weeks for regular maintenance. Includes 8 oz for treating up to 8,000 gallons.
- Why API Products? – For over 60 years, we've been a leader in the aquatics industry, developing and perfecting products and solutions for indoor aquariums and outdoor ponds. Today, our family of products includes treatments, testing, and nutrition.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000YJ45S0 |
| Allergen Information | Apple Free |
| Best Sellers Rank | #4,325 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #18 in Water Garden & Pond Treatment |
| Brand | API |
| Brand Name | API |
| Customer Reviews | 4.3 out of 5 stars 4,964 Reviews |
| Global Trade Identification Number | 00317163011461 |
| Item Form | Tablets |
| Item Type Name | Pond Sludge Remover |
| Item Weight | 311.85 g |
| Manufacturer | Mars Fishcare |
| Manufacturer Part Number | 146 |
| Model Number | 146 |
| Number of Items | 12 |
| Number of Packs | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163011461 |
| Unit Count | 8 Pounds |

## Product Details

- **Brand:** API
- **Item Form:** Tablets
- **Item Weight:** 8 ounces
- **Number of Packs:** 1
- **Unit Count:** 8 Pounds

## Images

![POND-ZYME SLUDGE DESTROYER (8 oz) Pond Cleaner with Natural Pond Bacteria - Up to 8,000 Gallons - Reduces Fish Waste Buildup - Consumes Muck & Sludge - Spring Start Up & Regular Care - Image 1](https://m.media-amazon.com/images/I/81ppCTuy9TL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: How much do I need to put in a 5000 gallon fish pond?  The new fish pond is used for the first time.  thanks**
A: Specific directions are stated on the bottle for start ups and maintenance. Do not over treat.

**Q: Is the container supposed to be sealed? I just recieved mine and there was no seal and powder was spilled inside the envelope**
A: Yes, it should have a seal, but it occasionally gets stuck to the lid such that it comes off with the lid when you remove it.

**Q: Can i use this in a plastic dog pool?**
A: Yes, you may use this in a plastic pool.

**Q: Can this pond-zyme sludge destroyer be used with a uv light sterilizer or will the uv light destroy the bacteria?**
A: Yes, this product can be used with a UV light. A standard UV light used in filters for ponds will not destroy or inhibit the bacteria.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for my pond
*by E***H on July 14, 2026*

Best I’ve found to kill string algae and control my pond. Water stays clear. Red eared slider is happy. Fish are thriving. Totally worth it and I’ll be using this forever.

### ⭐⭐⭐⭐⭐ keeping my pond very clean
*by R***E on June 28, 2024*

I use this and the algae fix and between the two I have noticed a huge improvement. This more than the algaecide definitely. I’ve had the pond 10 years and this is the first year the algae is actually slowly coming off the sides and bottom. It’s literally a 7 x 15’ concrete hole in the ground next to the front door with a waterfall and fountain. It’s 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 it’s a nice quiet time for me. The ornaments always get caked with algae no matter what. And the rocks and waterfall, too. This doesn’t really help that thick black algae that builds up on the rocks. API makes a waterfall oxi powder but i’m too scared to use it bc i’ve 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. I’m pretty much just referring to the constant fish waste and algae buildup around the ornaments and in general. I’ve 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 i’ve noticed a huge reduction in algae since adding this to my pond maintenance schedule. It’s June now so i’m sprinkling a little bit in every other day and algaefix every 3 days. I’m 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.

### ⭐⭐⭐⭐ It does remove unwanted algae
*by C***R on November 6, 2025*

I’ve used it in a small outdoor pond and it has helped considerably in removing a large growth of algae.

## Frequently Bought Together

- API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 8oz container (146)
- API POND ALGAEFIX Algae Control 32-Ounce Bottle, FISHAQUARI (169G)
- API POND ACCU-CLEAR Pond Water Clarifier 16-Ounce Bottle

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-28*