Seachem Matrix

Best filter media there is, simple as that. A bit pricey, but its deffinitely worth it. I wouldnt trust the label tho, 250ml for 200l water is way off.

Probably One of the best filter media,make the work very well! 1lt Is enough for 150/200 LT tank. Very good!

Every time I buy a product that the manufacturer sells sealed and the retailer sells it to me Not Sealed, I have the feeling of being deceived.

I used a lot of different medias already, from the basic ones that come with filters, to top brands like ADA, and this is my top media since I tested it, lasts for long, it provides a very good bacteria colonization, just wash before use and it rocks.

Previously, I dealt with the matrix only when buying Tidal 55. Now I bought a 4 liter bucket in a new external filter. But inside it was damp and smelled like an aquarium. As if the media had already been used before me. Havent tried other packages before but would like to compare. If the product was before me in someones filter, then this is not pleasant. Despite the fact that it still works. Buy 2 liters or less, there is a packaging with a protective film.