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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

API Stress Zyme Cleaning Solution for Freshwater and Saltwater Aquariums, 473 ml Bottle

Product ID: 48370683

Details

Brand
API
Item form
Liquid
Item weight
544.31 Grams
Liquid volume
473
Number of Packs
1

🌊For freshwater & saltwater tanks

🦠300M+ live beneficial bacteria

♻️Natural sludge consumption

€ 37.66

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Portugal.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

🧪 Transform your aquarium into a self-cleaning aquatic paradise!

SLUDGE BUSTING ACTION - Effortlessly consumes organic waste, keeping gravel and decorations pristine without scrubbing.
DUAL ENVIRONMENT FORMULA - Perfectly balanced for both freshwater and saltwater aquariums—versatility meets performance.
POWERFUL 300 M LIVE BACTERIA - Supercharge your tank’s natural cleaning cycle with billions of beneficial microbes.
TRUSTED 50 YEARS INNOVATION - Backed by decades of research, API ensures your aquatic ecosystem thrives with minimal effort.
WEEKLY MAINTENANCE MADE EASY - Just 5ml per 38L weekly keeps your aquarium healthy and crystal clear—less hassle, more admiration.

API Stress Zyme Cleaning Solution is a 473ml liquid treatment containing over 300 million live bacteria per teaspoon, designed to naturally consume sludge and organic waste in both freshwater and saltwater aquariums. By boosting the biological filter weekly, it reduces maintenance, keeps gravel and decorations clean, and promotes a healthy aquatic environment trusted by hobbyists for over 50 years.

Specifications

ASIN	B000255N3W
Allergen Information	Apple Free
Best Sellers Rank	4,448 in Pet Supplies ( See Top 100 in Pet Supplies ) 47 in Aquarium Water Treatments
Brand Name	API
Country Of Origin	China
Customer Reviews	4.7 4.7 out of 5 stars (11,813)
Global Trade Identification Number	00317163160565
Item Form	Liquid
Item Type Name	API STRESS ZYME CLEANING SOLUTION 473ML BOTTLE FOR FRESHWATER AND SALINE AQUARIUM
Item Weight	544.31 Grams
Liquid Volume	473 Millilitres
Manufacturer	API
Manufacturer Part Number	56E
Model Number	56E
Number of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	317163160565
Unit Count	473.0 millilitre

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 37.66

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Portugal.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews