Tetra FilterActive filter starter with highly active Live Bacteria, supports biological activity in the aquarium, accelerates removal of harmful substances, optimises cleaning performance of the filter, various sizes

Not much to say about the Tetra brand except from it's amazing. Always so simple and effective to use. Great value for money right now, as I got them on sale. 2 for £15 bargain. Water clarity is amazing and helps the longevity of the water extending the need for maintenace. Water levels are lovely and stable keeping my fish healthy.

Great price and product.

My tank was cycling and I was putting this directly on my foam filters within a week I was getting 0ppm ammonia and 0ppm nitite, my aquarium is also a planted aquarium which may have also had something to do with it.

This to appears to work better than other similar items on the market, that l have used previously.

I've been using this product for a long time, in my opinion it doesn't even need a review because everyone who has an aquarium already knows about the brand. The only thing I didn't like was the seller to advertise a product in the photo and send a product with the different packaging.

Tanks a bit overpopulated, and although my 307 canister can handle it, the prefilter sponges do get a bit clogged up. Since using this I have noticed a bit less gunk so I guess it works.no issues with my fish when using it. Decent price so can't complain really.

Goid stuff for an emergency tank balance

Thanks, it works

Weer helder water na 2 dagen. Goed product

Très bien c’est ce qui me fallait pour mon poisson ! Je suis satisfaite de mon achat il est moins cher qu’en animalerie. De plus la livraison a été parfaite ! Je recommande ce produit et en plus il y a de quoi faire plusieurs mois ! Merci 👍🏻

Mycket bra

Kwaliteit bij aquarium water vervangen zijn bacteriën erg belangrijk snelle levering

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