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🧪 Transform your aquarium into a crystal-clear aquatic paradise effortlessly!
API STRESS ZYME is a scientifically formulated aquarium cleaning solution containing over 300 million live bacteria per teaspoon that naturally consumes sludge and organic waste. Suitable for both freshwater and saltwater tanks, it reduces maintenance by boosting the biological filter and keeping gravel, glass, and decorations clean. Use weekly for ongoing tank health or double dose for new setups to accelerate cycling. Trusted by aquarists for over 50 years, it’s the go-to solution for a vibrant, healthy aquatic environment.











| ASIN | B000255N3W |
| Allergen Information | Apple Free |
| Best Sellers Rank | 2,771 in Pet Supplies ( See Top 100 in Pet Supplies ) 26 in Aquarium Water Treatments |
| Brand | API |
| Brand Name | API |
| Country Of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 11,728 Reviews |
| Global Trade Identification Number | 00317163160565 |
| Item Form | Liquid |
| Item Type Name | API STRESS ZYME CLEANING SOLUTION 473ML BOTTLE FOR FRESHWATER AND SALINE AQUARIUM |
| Item Weight | 544.31 Grams |
| Item form | Liquid |
| Item weight | 544.31 Grams |
| Liquid Volume | 473 Millilitres |
| Liquid volume | 473 Millilitres |
| Manufacturer | API |
| Manufacturer Part Number | 56E |
| Model Number | 56E |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163160565 |
| Unit Count | 473.0 millilitre |
K**A
Useful for starting a new tank
It simply replaces all those starter kits as you can double the dose for a new aquarium to boost the biological filter. What a brilliant product! My guppies are happy with this.
N**N
Fish
Good value for money
S**N
Great item
Have used this product religiously on my water changes and don't ever see that changing
A**J
Works
Bit pricey but works for regular use
A**.
API Stress Zyme+
Been using this for years. No problems and does it's job in conjunction with API water conditioner.
B**N
Many thanks
Great product
O**.
Combined with regular water changes this product keeps things nice and clean
I was sceptical at first as it's hard to prove that it was doing much as I began using it after resurrecting a tank that was left to wallow by a colleague. How does one know which of the cleaning products and techniques are keeping things clean? I recently ran out of this and it’s taken me about a month to get round to getting some more. In that period the tank hasn’t turned into a jungle but I have noticed that it is slightly dirtier than when I was regularly using this. The cap has a built in measurer, I use a cap full once a week on a medium 50 litre tank with 1 goldfish and 3 snails in. Combined with regular water changes this product keeps things nice and clean, and even when I’ve missed water changes – using this helps maintain a reasonable level of cleanliness. It’s priced the same on here (£7.98 at time of writing) as the smaller bottle is in my local pet store so no complaints there.
J**Z
Great product
Love this product. Aside from being effective it is cheaper than others.
Trustpilot
2 months ago
2 weeks ago