FluvalU2/U3/U4 Internal Filter Biomax 110g

This is the best bio media on the market especially for internal filters. They gather so much good bacteria that is needed to keep the tank cycling . Even on a overstocked tank this always keeps my readings of nitrite and ammonia at 0 on all my 3 aquariums honestly the best on the market and I've tried a few over the years but nothing comes close to this stuff absolute gold

I always buy this particular product for my Fluval U2 64 litre fish tank along with carbon and sponge filters so the fish have the best possible chance of a bacteria free tank and good living conditions and clear water.

I haven't changed the first original set and after searching on line a lot, there seem to be confusion on when or if they should be changed. The quality of it does not seem to be affected yet, and although I clean the aquarium, perhaps too frequently than I should, I have yet to see a reason why they should be changed at all.

Very little dust. Nicely packaged, no wasted components. Seems to be doing a good job as water quality remains good so bacteria are present and colonising these.

Filled up my u4 after the small amount that came with it was half a baskets worth. This done the trick