What Filters

Iridium_2256

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HOBs have a high flow, mechanical and biological filtration. Sponge filters have a low flow(besides the bubble from the top) and only biological filtration. They work better for different purposes. A sponge filter works well for fry, medical and betta tanks, while an HOB will work well for any other application
 

Jocelyn Adelman

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I use and like both, each suit different purposes. More like an apples and oranges comparison vs one being better then the other. Only advantage an hob has is the ability to add carbon to pull out meds....
 

Mike1995

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I use a sponge for my betta and in the past my guppy fry. really good option for fish that don't like high flow. I've found they take awhile to cycle if you're doing it in a new tank.
 

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