Whisper Bio Bag 12 pack (large) (Item No Longer Available - Discontinued by Whsiper)
Bio Bag 12 pack. Regular size.(now called Large Size by manufacturer) Fits 20, 30, 40, 60, 10-20, 20-40, 30-60, C, 1, 2, 3, Triad 1000, 2000, 3000 and in tank filters 20i and 40i.
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