API Stress Zyme 8oz

$11.99 $8.49 Save: $3.50 (29%)

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Aquarium Pharmaceuticals, API, MARS Fishcare

Improves the development of the biological filter and helps clean a dirty aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. Continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. Use when setting up and maintaining an aquarium. For use in freshwater or saltwater.

Purpose and Benefits:

Stress Zyme is a biological filter additive containing live bacteria that improves the development of the biological filter and helps clean a dirty aquarium. The build-up of organic pollution in the aquarium inhibits the growth of nitrifying bacteria. The bacteria in Stress-Zyme keep conditions in the aquarium right for the development of the biological filter by consuming harmful organic pollutants. This speeds the development of the biological filter in newly set up aquariums. A build-up of organic compounds also promotes the growth of disease-causing organisms in the aquarium. Stress Zyme keeps the biological filter working properly by keeping the aquarium gravel and filter clean. Water quality and living conditions are improved when Stress Zyme is used on a regular basis.

Each teaspoonful of Stress Zyme contains 300 million bacteria. These bacteria are in a dormant state and become active when added to the aquarium. Stress Zyme has a five year shelf life and does not require refrigeration. Stress Zyme is effective in freshwater and marine aquariums.

Directions for Use:

  • New Aquariums:
    • Shake well before using
    • On the 1st, 7th, and 14th days add 2 teaspoonfuls (10 ml) for every 10 US gallons (40 L) of aquarium water. Thereafter, each week add 1 teaspoonful (5 ml) for every 10 gallons (40 L) of aquarium water.
  • Existing Aquariums:
    • To maintain good water quality and healthy biological filtration, add 1 teaspoonful (5 ml) for every 10 U.S. gallons (40L) of aquarium water weekly.
Compatibility: Stress Zyme can be used with freshwater tropical fish, marine fish, invertebrates and coldwater species including koi and goldfish. Stress Zyme will not harm aquatic plants. Keep from freezing. Do not store above 120°F (49°C). Stress Zyme is completely harmless to humans and pets.


Product Manuals & Documentation

API Stress Zyme 8oz

Owner's Manual available for download in Adobe PDF file format

API Stress Zyme 8oz

Additional Info 1 available for download in Adobe PDF file format

Manufacturer Info

Aquarium Pharmaceuticals Aquarium Supplies
Aquarium Pharmaceuticals (API) has been helping people take good care of ornamental fish for over 40 years. Their research and development scientists have advanced the care of fish with all-natural medications, stable bacteria for biological filtration, one-bottle test kits, consumer-friendly dosing caps and much more. They’ve received over 25 global patents for their breakthrough innovations in the aquatics industry. And they continue to look for ways to improve the fishkeeping experience for hobbyists. Research. Experience. Dedication to scientific, quality treatment for healthy fish. It’s what makes API the first choice of aquarium owners. API manufactures and sells hundreds of products across many different product categories, including aquarium and pond treatments, aquarium equipment, aquariums and fish nutrition.

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“Great Product”
5.0

Clouds the water up a bit but it seems beneficial for the livestock. Haven't seen any adverse effects so far so good!

  • 1
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“Great Product”
5.0

This is a wonderful product to use. The cost was so very resonable.

  • 1
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“live bacteria”
4.0

Used this to help cycle a new tank. Helped the new tank cycle quicker and appeared to reduce stress on inhabitants.

  • 1
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“can't go wrong”
5.0

if you never tried this, you don't know what you are missing !!! for first time users i recommend if you buy the regular bottle, do a 4 day dosage.(for larger tanks 60gal+) smaller tanks should use a smaller amount). i have never overdosed with this product and i don't believe it is possible.(result...Read More

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“Awesome Product!”
5.0

I've always been extremely happy with this product, it was wonderful to find it in larger sizes than the smaller bottles normally found in pet stores. Rock On!

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“I Does as Advertised.”
5.0

I have a 30 gal reef with lighting and inhabitants for shallow reef, not to fast current flow, not much turbidity. I find this Sress -Zyme to be quite a step Up on helping to reduce to accumulation of dentritus the crabs and Wrasse's dont get. The water clarity and overall cleanliness within the tan...Read More

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“Started using as a 'Beginner'”
5.0

My first tank was a 55gal reef. And, I was using Stress Zyme way back then. Never had any real algae problems since startup, didnt have any fish diseases's, no nusance(sp?) algae, still have the same Macro Algae I started with in the 15gal refugium/sump. i always get the biggest bottle my LFS has ...Read More

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