Re: airpump on when lights are off?
Its generally not needed. But as Mr. Doyle said, if your fish are gasping for air at the surface, then running one isn't a bad idea. It normally only happens when you are injecting CO2 from a unit and not a DIY system.
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Member of the AGA (Aquatic Gardner's Association)
Member of the IBC (International Betta Congress)
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