Undergravel filters for aquariums

Undergravel

— filters installed at the bottom of the tank. Aquarium soil is used here as a filter material, so it is extremely important to take into account the particle size of the substrate and the depth of the bottom filter. It is also worth considering the location of the aquarium decorations and the dense roots of plants - they can prevent the passage of water through the pores of the filter, forming “dead zones” where silting will occur.