I have a Top Fin Aquarium Power Filter, one for each of my 10 Gallon tanks. Or at least I think that is the correct brand. Petsmart website won't show pictures and I am at work 20 minutes from home so I am not 100%. Either way, I use the standard cartridges (double layer blue floss with carbon on a black plastic frame). My fish tanks do relatively well but I am wondering if anyone has made improvements on these filters, additional sponge, double cartridge, etc.? Or should I can these things and look for more renowned, reliable filtration? :roll: