Does anyone here use this type of filter instead of canisters or HOB types? I belong to another site and some of these people swear by this type. If its as efficient as claimed, think of how much money and time you would save on media and cleaning filters. An air hose run through a sponge pulling water through the sponge creating a large bacteria bed enriched with oxygen, how much simplier can it get. Any opinions on these because I'm thinking about trying this method.