Hakko AeratorsIf you are having trouble sizing an aerator for your pond, Just fill out this form and we will let you know! Recommended Pond Size: The 25L is suitable for 1,000 2,500gal ponds at 3' of depth. If you have a heavier fish load we recommend sizing up your pump or adding extra diffusers. The 40L is suitable for 2,000 4000gal ponds at 4' of depth. If you have a heavier fish load we recommend sizing up your pump or adding extra diffusers. The 60L is
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