







🌟 Dive into effortless aquarium bliss!
The API STRESS ZYME Freshwater and Saltwater Aquarium Cleaning Solution is a powerful 16-ounce liquid formula designed to keep your aquarium clean and healthy. It effectively consumes sludge, adds beneficial bacteria, and is safe for all fish species, making it an essential weekly maintenance solution for both freshwater and saltwater tanks.













| ASIN | B000255N3W |
| ASIN | B000255N3W |
| Best Sellers Rank | #3,992 in Pet Supplies ( See Top 100 in Pet Supplies ) #20 in Aquarium Water Treatments |
| Brand Name | API |
| Color | multi natural |
| Country of Origin | United States |
| Customer Reviews | 4.7 4.7 out of 5 stars (12,002) |
| Date First Available | June 20, 2004 |
| Date First Available | June 20, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | Use weekly for a healthy, clean aquarium and to maintain a strong biological filter. Shake well. Using dosing cap on bottle, add 5 ml per 10 gallons (38 L) of water. For new aquariums and to help boost the biological filter, double the dose at start-up and use for 2 additional weeks. |
| Is Discontinued By Manufacturer | Yes |
| Item Dimensions LxWxH | 10 x 10 x 10 inches |
| Item Package Dimensions L x W x H | 8.48 x 2.36 x 2.28 inches |
| Item Weight | 544.31 Grams |
| Item model number | 56E |
| Item model number | 56E |
| Manufacturer | Mars Fishcare |
| Manufacturer | Mars Fishcare |
| Manufacturer recommended age | 1 month and up |
| Material | Plastic |
| Model Name | STRESS ZYME, 16 OZ |
| Number of Items | 1 |
| Product Dimensions | 10 x 10 x 10 inches; 1.2 Pounds |
| Size | 16 oz |
| Style | Freshwater |
| Target Audience Keyword | fish |
A**S
Good 👍
Cleans good fish tank.
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.
V**G
Great product and reliably works!
Have used Stress Zyme for many, many years now in my tanks. It really does work. Some know-it-alls, claiming with their PHd's, ect. on fish forums, that this is bogus, that there is no live culture bacteria and can't work, that living bacteria cannot be kept alive in a bottle of liquid. Hogwash. Their medicine they take, such as liquid penicillin... is exactly that. Live bacteria in liquid form. In a bottle. Also that penicillin, the fact that it works, proves THIS bacteria also CAN and does work. The over edumacated people need to get educated on their facts and get them straight. Good bacteria culture NEEDS adding to your tanks to make them more like a good natural made spring fed lake or pond system has, good bacteria that 'mother nature' naturally adds. I have an irridescent shark in my tank, have had him/her since 1997. He/she is still healthy, never had any illness that needed treating. Even when I had other fish in the tank with it, this Stress Zyme cultures kept down the smell that a normal tank normally has. I can open the lid and sniff and virtually smell nothing. If I run out, and not use any for a while, the smell comes back, builds up. Start adding Stress Zyme again and the smell goes away. Fish are more alert and calmer with this added. Irridescents are very skittish and splashy fish. If they are calm, and if there is no smell to your tank when using this, then that means this stuff is working. 2 thumbs up.
D**E
Good value.
It works.
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.
A**R
Great product.
I was struggling with a lot of green and brown algae. Even with real plants and consistent water changes. I used less than the recommended dose for a 5 gallon tank. It’s been one week and the water has improved so much! I have significantly less algae and the water is clear. I’m always worried about the health of my fish when introducing a new product, but he seems just fine
J**N
Great for my aquatic frogs
I use this religiously with my African dwarf frogs! They are still kicking strong after 3 years so it must be working!
J**O
Great Product.
Never fails I have ben using it for over 20 years.
S**N
Have used this product religiously on my water changes and don't ever see that changing
R**E
Very good antibiotiques for the fish
S**M
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
I love the brand
D**S
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.
Trustpilot
1 week ago
2 months ago