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.

QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria Bottle,White, 473 ml

Product ID: 53942122

Details

Brand
API
Item form
Liquid
Item weight
454 Grams
Liquid volume
473.6
Manufacturer
API

⚡instant fish addition support

🌊works in fresh & saltwater

🧪473 ml potent bacteria solution

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€ 64.48

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Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🐠 Dive in now—because your fish deserve a flawless start!

TRUSTED BY THOUSANDS - Backed by 14,966+ reviews and a 4.6-star rating—join the thriving community of savvy aquarists.
DUAL ENVIRONMENT POWER - Formulated for both freshwater and saltwater tanks, maximizing versatility.
TOXIC COMPOUND REDUCER - Continuously lowers harmful ammonia and nitrite levels to protect your aquatic life.
ECOSYSTEM RESTORATION BOOST - Replenishes beneficial nitrifying bacteria after water changes or filter swaps to maintain balance.
INSTANT AQUARIUM ACTIVATION - Add fish immediately with confidence—no waiting required.

API QUICK START is a 473 ml liquid bacterial solution designed to jumpstart and maintain healthy aquarium ecosystems in both freshwater and saltwater tanks. It enables immediate fish introduction by rapidly establishing beneficial nitrifying bacteria that reduce toxic ammonia and nitrite levels, helping prevent fish loss. Ideal for new setups, water changes, and filter media swaps, this product is a must-have for proactive aquarium care, trusted by thousands of aquarists worldwide.

Specifications

ASIN	B006YG12F6
Allergen Information	Apple Free
Best Sellers Rank	1,365 in Pet Supplies ( See Top 100 in Pet Supplies ) 15 in Aquarium Water Treatments
Brand	API
Brand Name	API
Country Of Origin	USA
Customer Reviews	4.6 out of 5 stars 15,011 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
Pet Type	Fish
Target Species	Fish
UPC	317163050897
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

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

I**O

Great

Working well.

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

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

P**A

API

Great api quick start.

20.01.2026

D**S

Quick Start aquarium liquid

It is good stuff but wait 4 weeks before putting any fish in your tank. Plants growing very strong.

23.03.2026

R**T

Works

Great product

26.02.2026

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TrustScore 4.5 | 7,300+ reviews

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