You should not need to replace the sponge at the base of the HS-72's Machine's pitcher. Just keep it clean, or if it gets soiled, it can be cleaned as you would any sponge. [Note: I clean my sponges in the top rack of the dish washer]. If your sponge gets lost or damaged beyond repair somehow, this is the replacement for it. You cannot operate the HS-72 Machine properly without this sponge, and no other substitute sponge will do.

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SURVIVE! Replacement Filters
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$19.95

PureEasy Replacement Filters
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$24.95

Gravity Filter - Replacement Filters
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$99.95

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HS-72 Hydrogen Generator Replacement Filter
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$79.95

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Elita Pure Replacement Filter
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$129.95

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Buder Hydrogen Water Machine
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$895.00

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HS-72 Hydrogen Generator Replacement Filter
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$79.95

High-Rich 2 Hydrogen Water Machine
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$199.95

Alkaline Plus PH Ionizer Pitcher
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AlkaViva 9-Plate Vesta H2 Water Ionizer
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$2,995.00

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Nexus X-Blue Water Ionizer
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$995.00

Jupiter Athena Water Ionizer (Classic Athena)
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$1,595.00

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BIOBASE HGC-300S HYDROGEN GAS MACHINES
$1,645.00
$1,645.00
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Smart 9P Water Ionizer - Molecular Hydrogen Rich
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$1,595.00