Can This Be used for marine aquariums?

States suitable for all Freshwater Aquariums so I don't believe it is suitable for marine

Does this help stop brown algae?

No. It aids your filtration system after clean ups and water changes.

I added it to the water but realise now should add to filter, can i do a second dose the day after?

It shouldn’t really matter as it would soon be pumped around the tank best put all in anyway if your starting a new tank once cycled start of very slowly as it 6 to 12 months to fully cycle an aquarium add clean up crew first

Do I need to add a couple of fish as well to help maintain the bacteria I'm putting in please?

There are 2 or 3 options when using this you need ammonia in the water for the good bacteria to feed on. So you could put some very hardy fish in there to produce waste as in there poo and pee which would create Ammonia for your bacteria to feed on or you could put a few flakes of food in the water which would break down and create Ammonia or thirdly you could put pure Ammonia in the water which the good bacteria would feed on. I normally just put a bit of food in the water its the best way of starting the cycle without the risk of harming any of your fish. You could also look at Prime conditioner and Prime stability make sure you test the water often it still takes time even when using this product be patient good luck.

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Tetra FilterActive Bacteria

Product ID: 48451818

Details

Brand
Tetra
Item form
Liquid
Item weight
0.28 Kilograms
Liquid volume
250
Unit count
250.0

⏳extends filter cleaning intervals

🦠live starter & sludge-reducing bacteria

⚗️250ml potent liquid formula

AR$49385

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Description

🦠 Keep your aquarium thriving with the ultimate bacterial boost—because your fish deserve the best!

SLUDGE BUSTING POWER - Naturally breaks down organic waste, reducing filter clogging and keeping water crystal clear.
EFFORTLESS MAINTENANCE - Extends filter cleaning intervals, saving you time and hassle without compromising water quality.
SAFE NATURAL FORMULA - 100% biological liquid that won’t cloud water or harm your aquatic life—perfect for sensitive tanks.
BOOSTS AQUARIUM BIOACTIVITY - Replenishes essential nitrifying bacteria lost during cleaning to maintain a healthy ecosystem.
INSTANT LONG TERM SUPPORT - Provides immediate bacterial boost after water changes or fish additions, stabilizing your aquarium environment.

Tetra FilterActive is a 250ml liquid bacterial supplement designed to restore and maintain the biological balance in aquariums. It contains live starter and sludge-reducing bacteria that accelerate the breakdown of harmful ammonia and nitrite, reduce sludge buildup, and extend filter cleaning intervals. This 100% natural formula supports water clarity and fish health, making aquarium maintenance easier and more effective.

Specifications

ASIN	B00MBEFGUM
Best Sellers Rank	1,892 in Pet Supplies ( See Top 100 in Pet Supplies ) 12 in Aquarium Water Treatments
Brand Name	Tetra
Country Of Origin	Germany
Customer Reviews	4.7 4.7 out of 5 stars (12,195)
Global Trade Identification Number	04004218247079
Item Form	Liquid
Item Weight	0.28 Kilograms
Liquid Volume	250 Millilitres
Manufacturer	Spectrum Brands
Manufacturer Part Number	247079
Model Number	247079
Number of Items	1
Pet Type	Fish
Target Species	Fish
Unit Count	250.0 millilitre

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AR$49385

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered 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 Argentina.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Received my product in pristine condition. Great service overall.

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