
I love these bags and their size makes them suitable for a variety of filter media in a variety of filter types (10 gallon and AquaClear 50). Gallon, they are also great for covering the inlet in fry tanks. My only complaint is that the small ones are so expensive compared to the large ones. But they are what I needed and the big ones just took up too much space, I had no luck with the tights as the color was spreading and possibly starting to die off (the other explanation didn't seem to make sense - big water changes didn't give anything, everything else was the same, and the fish that went to another quarantine tank survived). So yes this is what I needed and it works great. Several people have asked me about the sizes and what filters these bags work with. Bag sizes are 6 inches. x 3" and I have used them with media frames in the Whisper 10, Topfin 10, Tetra 3i and Marina s10. The bag is too loose for the Tetra 3i but I just tuck in the extra fabric. They should work with the Tetra 10i - I just didn't have any of these filters to experiment with, they won't work with the Aqueon 10 as it has a very different shape and a slot at the bottom.

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