Had the fresh water tank about one month cant seem get the nitrite level down, any suggestion please.

Be patient. Mine took 6 months before maturing. Have you put fish in already? pooing, too much food etc can cause nitrate. Youncan get various nitrate absorbers which helps. I have now kept fish for 3 years and still occasionally get nitrate problems. Change water by 25% and keep this up until clear of nitrate, also cut down on food. whatever you put on your hands can also cause problems, w/in liquid ,moisteriser etc. Hope this is of help, but above all, patience.

How much should i use in 200 litre tank? i’m not very good when it comes to chemical measurements. and do you add when weekly water change? thank you

You need follow the directions on the back of the bottle as you would for medicine. The instructions are clear. You can use it weekly but it all depends on your tank. Ideally, test your water once a week and then decide. I use it once a month.

Amazon prime stated that this would be delivered tomorrow- as they always do. But they’ve given me a delivery date in a few days- help!!! Why??

transport dealys, out of stock, damag/missing orders, they dont like you ... lots of reasons.

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API STRESS ZYME Freshwater and Saltwater Aquarium Water Cleaning Solution 118 ml Bottle

API STRESS ZYME Freshwater and Saltwater Aquarium Water Cleaning Solution 118 ml Bottle

Product ID: 55119546

Details

Brand
API
Item form
Liquid
Item weight
136.08 Grams
Liquid volume
4 Fluid Ounces
Number of Packs
1

🌊Safe for freshwater & saltwater

🦠300M+ live bacteria per tsp

♻️Consumes sludge & organic waste

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Description

🧪 Transform your tank into a crystal-clear aquatic oasis—because your fish deserve the best!

SLUDGE SLAYER - Effectively consumes fish waste, uneaten food, and organic debris to keep gravel and decorations spotless.
TRUSTED LEGACY - Backed by 50+ years of API innovation, ensuring your fish thrive in a naturally clean habitat.
POWERFUL BIO BOOST - Over 300 million live bacteria per teaspoon to supercharge your aquarium’s natural cleaning cycle.
DUAL HABITAT FRIENDLY - Formulated for both freshwater and saltwater tanks—one solution, endless aquatic possibilities.
WEEKLY WELLNESS RITUAL - Simple weekly dosing maintains a balanced, healthy aquarium environment with minimal effort.

API STRESS ZYME is a scientifically formulated aquarium water cleaning solution containing over 300 million live bacteria per teaspoon. Designed for both freshwater and saltwater tanks, it naturally consumes sludge and organic waste, reducing maintenance and promoting a healthy biological filter. Use weekly to maintain crystal-clear water and a thriving aquatic environment, backed by over 50 years of API’s trusted expertise.

Specifications

ASIN	B0002AQLJW
Allergen Information	Apple Free
Best Sellers Rank	3,261 in Pet Supplies ( See Top 100 in Pet Supplies ) 34 in Aquarium Water Treatments
Brand Name	API
Country Of Origin	United Kingdom
Customer Reviews	4.7 4.7 out of 5 stars (11,741)
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	API
Manufacturer Part Number	56C
Model Number	56C
Target Species	Fish
UPC	317163040560
Unit Count	1 count

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