Aquarium Wooden Air Diffuser
. Natural micro pores of the wood produce a super-fine bubbles. They
increases the efficiency of air-driven protein skimmers. Each diffuser
is precisely hand cut against the grain of wood to allow the maximum
output of super fine bubbles to be released from the micro pores of
wood. Best used in salt water protein skimmers. Replace every 3-4 weeks
or when the bubble size increases.