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Penn-Plax air stones are long lasting and will create a fine dispersion of micro bubbles in the aquarium creating a gentile flow with very high amounts of dissolved oxygen transfer.
Couple an Air Stone up with a Penn Plax air pump for superior performance. The Silent Air line of pumps have many options from batteries to standard 110v outlets to power them. A battery powered air pump, and an airstone should always be around in the case of a power failure.
1x Air Stone