Filtration, part 4 - Undergravel filters and Fluidized bed filters

| Filtration, part 4 - Undergravel filters and Fluidized bed filters

Filtration, part 4 - Undergravel filters and Fluidized bed filters

Undergravel filter An undergravel will chiefly function as a biological filter, but larger debris can naturally also become trapped in the substrate. In this type of filter, water is forced through t...

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