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Thread: HOB Replacement
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post #2 of (permalink) Old 04-28-2019, 03:45 PM
Oso Polar
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Location: Westchester County, NY USA
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You'll need an air pump. Some of them are pretty quiet - you may get more noise from air bubbles coming out of the sponge filter. Also, if your tank is not covered, these bubbles "exploding" on the water surface will micro spray your light. Internal filter (or canister) will be quieter, probably more so than your HOB.
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