Matala Hakko Circle Air Diffuser, 8" Diameter OD-8 Nycon It is an excellent refill

It is an excellent refill for all filter cartridges and can be used for all freshwater and saltwater aquariums

30 foot power cord

Aquascape® Lake Bacteria help restore biological balance in large ponds and lakes

K+PF3000 Grey

Matala Hakko Circle Air Diffuser, 8" Diameter OD-8 Nycon It is an excellent refillThe Matala Hakko Air Hose Diffuser is an 8" diameter self weighted diffuser that produces medium sized bubbles. This low back pressure diffuser gives maximum air flow from the air pump. Can be connected to 3 8" diameter weighted hose and has three sized barb options. Note: We recommend at least one diffuser for every 20 to 25 liters of air volume when used with a diaphragm pump (to prevent excessive back pressure).