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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Sponsored Ad – Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml

Sponsored Ad – Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml

Product ID: 48451818

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Details

Brand
Tetra
Liquid volume
250
Item weight
0.28 Kilograms
Item form
Liquid
Manufacturer
Spectrum

⏳Extends filter cleaning intervals

⚡Speeds pollutant breakdown

🧫Live starter & cleaning bacteria

Description

🧬 Elevate your aquarium’s ecosystem with every drop!

EFFORTLESS MAINTENANCE - Significantly extends filter cleaning intervals, saving you time
SMART BIO BOOST FORMULA - Live bacteria mix enhances natural biological activity
TURBOCHARGE AQUARIUM HEALTH - Accelerates ammonia & nitrite degradation for crystal-clear water
VALUE PACKED 250 ML SOLUTION - Compact yet powerful—perfect for busy pros who demand quality
OPTIMIZED FILTER PERFORMANCE - Boosts your filter’s efficiency for a thriving aquatic environment

Tetra FilterActive Bacteria is a 250ml liquid formula combining live starter and sludge-reducing bacteria designed to accelerate the breakdown of harmful pollutants like ammonia and nitrite. It supports biological activity in aquariums, improves filter performance, and extends cleaning intervals, making aquarium maintenance easier and more efficient.

Specifications

Product Dimensions	18 x 11 x 15 cm; 283 g
Item model number	247079
Item Form	Liquid
Colour	250 ml
Size	250 ml (Pack of 1)
Number of Items	1
Quantity	1
Specific Uses	Indoor
Batteries required	No
Batteries Included	No
External Testing Certification	Grüner Punkt - ARA (Verpackungskennzeichen)
Item Weight	283 g

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