Increase the efficiency of your skimmer with a new air stone. It is wooden and really should be replaced every month if not sooner for best results in your 28 gallon Nano Cube HQI tank. MT-60-WS
- 3" by 1/2
- Required for proper diffusion of particulate matter in any marine aquarium with a protein skimmer.
- Made specifically for 28 gallon HQI nano cube but will work in other models
- Replace every month for best results on your cube or tank
- NOTE MANY OTHER BRANDS WILL NOT FIT THIS SKIMMER