The Universal Refillable Carbon Cartridge holds twice as much carbon as standard cartridges! It comes ready to use with high-grade, activated carbon. This Refillable Carbon Cartridge truly is Universal. It has a variable connector which fits any 7/8”, 15/16”, 1”, and 1-3/16” under gravel filter uplift tubes. This connector enables the cartridge to be used with any Lee’s® under gravel filter and most other under gravel filters.
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