May I use this when cleaning an aquarium weekly instead of using stress enzyme?

Yes, I use it every time I clean the aquarium. I usually put half the required amount directly into the filter (once I've clean it) and the rest in the tank itself. Its perfect for introducing new fish to the aquarium as well as when cleaning it out.

How much quick start should i use when doing a water change? should i use dosage vs total water in the tank (30l) or water i am changing (7.5l) thx

As it's a partial water change; not servicing the filter itself; stick with the amount for the total capacity of the tank will be adequate. A little over will do no harm either, adding a little now & then will keep both the tank & filter up with its ideal bacteria levels to process the muck etc. Some with more money then sense will dump the whole bottle regardless.

Do I need to remove the carbon whilst using Quick start.

Not at all, its all part of the natural waste breakdown you're attempting to build into the filter system overall. In any-case usual charcoal media is replaced a few times before the rest of the filter needs cleaning out. The charcoal itself will be somewhere else for the good bacteria to colonise. In some cases the bacteria will help quicken the breakdown the mulm clogging up the charcoal too & may extend its use a little.

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API QUICK START

Product ID: 53942122

Details

Brand
API
Item form
Liquid
Item weight
454 Grams
Liquid volume
473.6
Number of Packs
1

⚡Instant fish addition capability

🌊Effective for both fresh & saltwater

🧪473 ml potent liquid formula

734 kr

Duties & taxes included

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Sold byAmazon NorwayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🐠 Transform your tank instantly — because your fish deserve the best start!

TRUSTED BY THOUSANDS - Backed by 15,000+ 5-star reviews, a must-have for serious aquarium managers.
DUAL ENVIRONMENT MASTERY - Optimized for both freshwater and saltwater tanks, ensuring versatile use.
STRESS FREE WATER CHANGES - Supports safe water and filter media swaps without risking fish health.
ROUTINE PROTECTION FORMULA - Consistently reduces harmful compounds to keep your aquatic life thriving.
JUMPSTART YOUR AQUARIUM ECOSYSTEM - Add fish immediately with powerful nitrifying bacteria activation.

API Quick Start Nitrifying Bacteria is a 473 ml liquid solution designed to instantly establish beneficial bacteria in both freshwater and saltwater aquariums. It enables immediate fish introduction, reduces toxic compounds, and supports healthy aquatic environments during water changes and filter maintenance. Trusted by thousands, it’s a professional-grade essential for aquarium enthusiasts seeking rapid, reliable ecosystem balance.

Specifications

ASIN	B006YG12F6
Allergen Information	Apple Free
Best Sellers Rank	1,369 in Pet Supplies ( See Top 100 in Pet Supplies ) 7 in Aquarium Water Treatments
Brand	API
Brand Name	API
Country Of Origin	USA
Customer Reviews	4.7 out of 5 stars 15,339 Reviews
Global Trade Identification Number	00317163050897
Item Form	Liquid
Item Type Name	Aquarium Bacteria
Item Weight	454 Grams
Item form	Liquid
Item weight	454 Grams
Liquid Volume	473.6 Millilitres
Liquid volume	473.6 Millilitres
Manufacturer	API
Manufacturer Part Number	89E
Model Number	89E
Number of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	317163050897
Unit Count	473.0 millilitre
Unit count	473.0 millilitre

Reviews

M**S

Superb products.

Superb product. API is one of my resources for many of my aquarium essentials. Never had any problem with any of there items. Great value for money, with many products giving you size options for what you need. All products from medicated to water parameters and plant care. These products are made with an ease of understanding for what that purpose is and will help you on your fish keeping journey.

23.02.2026

S**B

Friendly bacteria

Friendly bacteria in a bottle. I used it to help mature my new filter with the current one and it's ideal for setting up a new aquarium. I choose to use it with water changes alongside other API products. This is a decent product and I recommend it to anyone that keeps fish.

29.08.2026

I**O

Great

Working well. My go to when starting a new tank.

14.04.2026

P**N

Mixed reviews.

The mixed reviews and its claims have made me worried about using this. However I put a half measure in. I found in some fish products you can have Armageddon so if in doubt don’t use it or use smaller measurements. I have no fish in the tank yet and I’ve been doing test strips. Fish in two weeks and water checks coming to satisfactory so must play some part. I usually use cycle but water tests for both have been good.

18.12.2025

R**T

Works

Great product

26.02.2026

K**E

worth the money

provides your tank with a bulk load of good bacteria to help build a colony against amonia and nitrates / nitrites

7.01.2026

T**A

Great product, great price

Great product and excellent customer service. My first bottle arrived empty, but the seller sorted it out straight away and sent a replacement very quickly with no hassle. Really appreciate how fast the problem was resolved. Very happy with the purchase and would definitely buy from this seller again.

17.03.2026

H**N

Good product!

Got this as a cheaper alternative to the more expensive axolotyl versions and it has been great. Like people have said it is quite small but it is also perfect as you only add a couple of drops each time.

21.03.2026

B**E

Very recommended

Its good to rapidly reduce ammonia

10.10.2024

L**H

Good but it’s such a small amount.

I was aware of the amount because I did read the description but it was still a little disappointing, haha. That’s just me. Good product though.

26.03.2024

L**E

Best product

Highly effective Improves water quality by maintaining bacterial colonies Easy to use... Rather than other products. Must to stepup a new tank.. also it is good to add once in month so replenish the bacterial colonies

22.08.2025

R**M

Very effective

Helped us speed up aquarium set up and cycle time. Little to no odour. Very pleased with how it worked to jumpstart a bacterial culture. Highly Recommend!

2.08.2026

T**E

For fish tank water

It is what it says it is. A very good product that I will purchase again if needed.

29.07.2026

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734 kr

Duties & taxes included

In stock

Sold byAmazon NorwayDelivered 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 Norway.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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