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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
Pay in 4 interest-free payments of $6.02 Learn more
Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
Original bag, tube

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It never fails you and can work anywhere

Most hobbyists change 25% of the water in their aquarium every 2 to 4 weeks, but heavily stocked aquariums, those that house large messy fish or extremely sensitive fish, or aquariums that are fed generously will benefit from more frequent changes

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