Shared older-ionizer filters
Some AlkaViva legacy cartridges appeared across Delphi, Athena, Melody, and old Jupiter/Emco listings. That overlap is why a product name alone cannot tell us which H2 model suits your home. Check the older-model filter directory for current listings and availability; an H2 upgrade is an optional new-machine path.
No need to guess based on a filter name alone.
First, identify what you used
They are useful clues to your previous setup—not a promise that a current H2 cartridge fits your older ionizer.
This UltraWater cartridge appeared in several older ionizer listings, including Delphi, Athena, Melody, and old Jupiter models. Use your machine label—not just the cartridge name—to find the right old-model guide above. It was a legacy replacement filter; an H2 Series upgrade is a new ionizer with its own filter system.
BioStone Plus was listed for most older Jupiter/Emco machines and for the right-side second filter position on the old Athena. Vesta GL had a separately named BioStone Plus product, so do not treat this shared version as a universal Vesta filter. Identify your old machine before comparing an H2 upgrade.
The .01M UF name appeared across multiple older-machine listings. It identifies a former ultrafiltration cartridge, not a current H2 part. If you know only the filter name, check your ionizer model and use the Delphi, Athena, Melody, or Jupiter/Emco guide to find an appropriate next step.
Customers who used Remineralizer Max may have chosen it for low-mineral water or as part of an older reverse-osmosis setup. An upgrade discussion should account for your water source and existing installation. Tell the specialist about your previous filter and any RO system before selecting a new H2 machine.
Important compatibility note
H2 Series replacement filters are designed for H2 Series machines. Do not order one for an older ionizer without checking compatibility with AlkaViva.
Find the old filter below, then identify your machine: older Delphi, Athena JS-205, older Melody, or older Jupiter/Emco. Keep the cartridge name or a photo of its label handy. An H2 upgrade replaces the ionizer; it does not make an H2 replacement cartridge compatible with an old machine.
A shared legacy listing describes older-product history, not a universal H2 successor. Identify your ionizer first, then compare the H2 options according to your installation and household needs. Ask a specialist if you are unsure which older model you have.
H2 Series replacement filters are designed for H2 Series machines. Do not order one for an older ionizer without checking compatibility with AlkaViva.
Clear answers
Still not certain? Have your machine name or a photo ready when you call.
775-324-2400No. The shared filter listing describes old-machine product history, not a universal H2 successor. Identify your ionizer first.
A helpful conversation starts with what you know
We can help you make sense of the older machine and talk through current options.
