Hygger Dual Multifunction Sponge Filter - Small CO2 Scrubbers its tail end is covered

its tail end is covered in dark polka dots

or weak feed-pump performance

Freshwater-specific spectrum: Designed to present aquatic plants

When water needs to be removed

Hygger Dual Multifunction Sponge Filter - Small CO2 Scrubbers its tail end is coveredHygger Dual Multifunction Sponge Filter Small The Hygger Dual Multifunction Sponge Filter Small is an air driven double sponge filter with an integrated media chamber for mechanical filtration, biological filtration, and gentle oxygenation in aquariums up to 40 gallons. It is a practical choice for freshwater, saltwater, shrimp, betta, fry, breeding, and low flow aquarium setups when paired with a suitable air pump. Hygger Small Dual Sponge Filter