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🧪 Transform your tank into a self-cleaning aquatic paradise!
API STRESS ZYME is a 4 oz bacterial cleaner designed for both freshwater and saltwater aquariums. It contains over 300 million live bacteria per teaspoon that naturally consume sludge, fish waste, and organic debris, reducing maintenance and promoting a healthy biological filter. Recommended for weekly use, this solution supports a balanced, clean environment, making aquarium care effortless and effective.



















| ASIN | B0002AQLJW |
| Allergen Information | Apple Free |
| Best Sellers Rank | #4,392 in Pet Supplies ( See Top 100 in Pet Supplies ) #21 in Aquarium Water Treatments |
| Brand | API |
| Brand Name | API |
| Customer Reviews | 4.8 out of 5 stars 12,098 Reviews |
| Global Trade Identification Number | 00317163040560 |
| Item Form | Liquid |
| Item Type Name | Aquarium Sludge Remover |
| Item Weight | 136.08 Grams |
| Liquid Volume | 4 Fluid Ounces |
| Manufacturer | Mars Fishcare |
| Manufacturer Part Number | 56C |
| Model Number | 56C |
| Number of Packs | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163040560 |
| Unit Count | 1 Count |
K**R
Great product
Works great! Simple directions and great value for the price.
M**S
Highly Recommend
Excellent Product..Thanks
S**R
10/10
Works really well with my tank keeping the water clear and helping reduce sludge on the filters which helps maintenance and keeping it running longer
A**6
Amazing product. Really works.
I use this weekly, RELIGIOUSLY. I do not miss a dose. This is my tank today, having not touched the filter in 18 months. (Fluval FX6 filled with only biohome filter media and polishing sponges.) I’ve only changed out the live plants when needed (pothos houseplant clippings) and used the magnetic algae glass scraper when needed. It’s a 75 gallon tank. I8 MONTHS!!! I highly recommend this product. Zero odor, zero nastiness.
H**I
The fish are doing well
I have been using this enzyme solution along with the API chlorine solution for about a year and seems to be working fine. The fish has survived :) It’s a little bit on pricy side.
G**O
Clear water
It works great. Keep my water crystal clear.
T**.
This really works
This really works! My plecostomoas was completely stressed out due to a faulty heater and was COMPLETELY pale in color. I started with a double dose and used it weekly and he is now over 75% back to normal color. Definitely recommend this for regular maintenance of your aquarium.
M**A
Pescera de hogar
Producto de calidad para pescera en el hogar
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.
S**M
El agua no se enturbia
Producto muy recomendable!el agua no se enturbia para nada,hay que tener un buen filtro,el mio no funciona bien y el agua no esta sucia pero huele mal por el filtrado,el producto es buenisimo.
S**A
Suggest
I love the brand
D**S
So far, so good
I was having some issues controlling nitrites. Used it, two days later, down to zero and stable. I don't see any issues with my Ph, fish, snail, shrimp and plants. I'll keep dosing the water as instructed.
S**E
Must product for fish keepes
My regular go to solution after water change.. this has helped my ponds as well as big tanks for maintaining good bacterial colonies in sump and canister filters
Trustpilot
1 month ago
1 month ago