API Stress Zyme Freshwater & Saltwater Aquarium Water Cleaner
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Help create a naturally balanced aquarium with API Stress Zyme Aquarium Water Conditioner. Waste, sludge and uneaten food can cause toxic junk, like ammonia and nitrite, to form in your tank. But this water conditioner contains over 300 million live bacteria per teaspoonful to help consume sludge and organic debris, working to keep your gravel and glass clean naturally. Use it weekly in fresh and saltwater aquariums to maintain a strong biological filter and a healthy, clean home for your finned friends.
Key Benefits- Keeps aquarium clean by reducing aquarium maintenance.
- Contains over 300 million live bacteria per teaspoonful to consume sludge and organic debris, keeping gravel and glass clean naturally.
- Use it weekly in fresh and saltwater aquariums to maintain a strong biological filter and a healthy, clean aquarium.
- All natural formula adds beneficial bacteria for a healthier aquarium.
- Helps boost the natural aquarium cycle.
HAZARDS TO HUMANS: Keep from freezing. Do not store above 120° F (49°C). Keep out of reach of children.
Keep from freezing. Do not store above 120 degrees F (49 degrees C).
Special Note
- 8-oz bottle treats up to 470 gallons.
- 16-oz bottle treats up to 940 gallons.
- 64-oz bottle treats up to 3786 gallons.
- 1-gal treats up to 7600 gallons.
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Item Number94508
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Aquarium TypeFreshwater, Saltwater
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Fish TypeTropical Freshwater, Betta, Cichlid, Goldfish, Marine Fish, Marine Invertebrate, Bottom Feeder
Use the API Dosing Cap on the bottle. Shake well. To maintain a clean, healthy aquarium: add 1 tsp. (5ml) per 10 U.S. gallons of water weekly.
Do any of your larger bottle sizes of API STRESS ZYME include a pump?
No, this API STRESS ZYME does not include an option with a pump.
Can I use API QUICK START and API STRESS ZYME at the same time?
Yes, these API products can be combined.
Can API STRESS ZYME be added while fish are in the tank?
API STRESS ZYME can be added while fish are in the tank.
Can API STRESS ZYME be used safely with catfish and other bottom feeders?
API STRESS ZYME is safe for use with catfish and bottom feeders.
How is API MARINE STRESS ZYME different from API MARINE STRESS COAT?
API MARINE STRESS ZYME is not a tap water dechlorinator, like API STRESS COAT. Instead, it works to reduce aquarium maintenance over time, consuming sludge to keep gravel clean and adding beneficial bacteria to boost the natural aquarium cycle.
When should I use API MARINE STRESS ZYME?
You may use API MARINE STRESS ZYME weekly, but especially whenever you perform a 25% water change in your aquarium in order to replace beneficial bacteria. This will ensure that you aquarium cycle continues to function normally for your fish.
Customer Reviews
100% Recommend
100% of reviewersrecommend this product
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37 Reviews
Showing 1-10 of 37 Reviews
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Great addition to tank maintenance
By Eliz on Oct 19, 2020
I have several fish tanks that I take care of at my workplace and this has been a great addition to regular tank maintenance. If the tank is looking a little dirty, I just put some of this in there and it clears up the sludge.
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A must have
By Rick on Jul 4, 2020
This is an absolute must have for weekly water changes. Using stress zyme with stress coat when changing water is an absolute must!! It keeps my aquariums clean,dramatically reduces sludge in the substrate,and just makes for a healthy environment for fish. One cap full per 20 gallons of water or a half of cap full for 10 gallons makes measuring a breeze... Api is the only way to go when buying freshwater conditioners!! And chewy makes it affordable and easy to get with fast free shipping! Thank you chewy
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fish love it
By 3143 on Jun 26, 2020
You can never put enough of this in. I wish they would specify the difference between this one and the marine zyme. They both say saltwater. I’m going to be trying the other next time.
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Essential for balance
By Dot2Dot on Sep 8, 2020
This is a long time favorite to keep my fish tank balanced and healthy!
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Re-balance
By triplecarat on Mar 19, 2020
I’d become resigned and fatalistic about the conditions of my tank. Told myself my neon tetras had neon tetra disease – therefore incurable. One big, oblivious bottom feeder and three fungus laden tetras, struggling and stressed. It even took me awhile to realize the algae bloom making the water opaque green was a sign something needed to change. Saw this product and because I’m simultaneously trying to improve the bacteria in my gut decided to give it a try. It has been five or six weeks and all is as it should be, clear water, healthy, alert fish, without the immense effort fish store personnel would’ve probably told me to engage in. And I write this kind of review rarely.
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Works great!
By Cheryl on Jun 26, 2020
This product keeps my aquarium in great shape & my fish healthy.
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love my fish
By Mudd on Mar 10, 2020
API products I find are the best for your fish. I love the prices on chewy, makes it affordable to buy. happy fish and happy me !
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Excellent product
By Mandy on Mar 30, 2020
I use this once a week for water changes in which i remove 30% weekly
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API products are the best!
By Jayden on Jul 28, 2019
I still tend to over-feed even though I know better. I can't stand the thought of any of my fish being hungry. This stuff works great at eating away excess food at the bottom of the tank. Very often, I hear people talk about using this instead of regular water conditioner. Please keep in mind, this product does not make tap water safe. It does not remove chlorine and chloramines and it does not detoxify heavy metals. API's Stress Coat is still required.
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Broken lid when pecking no parts in sealed box.
By Illba on Dec 7, 2019
In the past I was happy in your company now I'am not happy.
