This product is a mixed bed deionization color-changing DI resin filter cartridge refill designed for use in fish and aquariums. It has a size of 2 liters and a product dimension of 10 x 8 x 4 inches, weighing 3.26 pounds. The item model number is 330456 and it is not discontinued by the manufacturer. The liquid volume is 2 liters and it is sold as a pack of three.
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