Fluval Aquaclear 30-Gallon Biomax (3 Pack)

I don't live close by a pet store to buy my pet supplies, so ordering them through Amazon has worked out greatly. The Fluval Aquaclear biomix in a 30 gallon capacity along with the other needed elements to keep the tank clean works out greatly. I only have to change out the chemicals about every 2 months.

Perfect to keep in filter for bacteria

It's exactly what you'd expect...what else can I say? These fit the filter unit it was designed for, and function as intended. There's nothing negative to say about them.

Only one we use for our fish tanks.

Really don't have any idea if these are working or not, but the water test levels remain great and have no issues with sick fish, so I guess it it good. Fits my 30 gallon filter perfectly.

You will wash your walls with this type of unit. Buttons for selecting on/off, intensity of water, are too easy to move.

Exactly what I need for my filter and much better price than I a pet store. Great quality and fast shipping. I highly recommend them.

I think this product fir perfectly into my filter but I am not too sure it cleared the water effectively.