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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HS-72 Lourdes Hydrogen Water Machine
Now:
$995.00

PureEasy Replacement Filters
Now:
$24.95

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Vitamin C Shower Filter Replacement
Now:
$27.95

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Elita Pure Replacement Filter
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$129.95

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HS-72 Hydrogen Generator Replacement Filter
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$39.95

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HS-72 Lourdes Hydrogen Water Machine
Now:
$995.00

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HS-72 Hydrogen Generator Replacement Filter
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$39.95

High-Rich 2 Hydrogen Water Machine
Now:
$199.95

Alkaline Plus PH Ionizer Pitcher by WellBlue
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$45.00 - $114.95

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

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Jupiter Athena Water Ionizer (Classic Athena)
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$1,895.00

BIOBASE HGC-300 HYDROGEN GAS MACHINES
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$1,645.00 - $1,745.00

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Alkaline Plus by WellBlue Replacement Filters
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$19.95