The Planted Tank Forum - View Single Post - Best way to install/refill inline bubble counter
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post #3 of (permalink) Old 12-09-2012, 06:00 PM
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Join Date: Feb 2009
Location: San Francisco
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if use mineral oil, fill the bubble counter with blunt tip long needle syringe .

if use water, dip the bubble counter in a coup/bottle of water to fill it, then re-attach to air hose.
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