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Air Pump Check Valves Slowing Air Flow

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Hey Guys,

I recently added check valves to the air pumps on my 5 footer as the thought of draining my tank via the air stone while I'm not at home doesn't really appeal to me.

Problem is, they slow the flow of the air pumps down to less than half of what they were putting out when they were directly connected to the air stone.

Was just wondering what experiences you have had and if this is just the nature of aquarium non-return valves and I should live with it, or if I should experiment with different brands?



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