Full side-by-side
AlkaViva H2 Athena Mfr claim
·
Coral Premium 9 Mfr claim
| Spec | AlkaViva H2 Athena | Coral Premium 9 | Winner |
|---|---|---|---|
| Origin | USA (imported) | Singapore | — |
| Distribution | Online · ships internationally | Direct retail | — |
| Category | Alkaline ionizer (US import) | Hydrogen water + multi-stage filter | — |
| Plates | 5 | 9 | Coral Premium 9 |
| pH (max alkaline) | 10.3 | 8.3 | AlkaViva H2 Athena |
| ORP | -650 mV | -120 mV | AlkaViva H2 Athena |
| Dissolved H₂ | 0.92 ppm | 0.1 ppm | AlkaViva H2 Athena |
| Flow rate | 2.4 L/min | 2.2 L/min | AlkaViva H2 Athena |
| Warranty | 5 yr | 2 yr | AlkaViva H2 Athena |
| Filter cost (each) | S$ 220 | S$ 160 | Coral Premium 9 |
| Sticker price | S$ 3,200 | S$ 2,968 | Coral Premium 9 |
| 5-year total | S$ 5,400 | S$ 4,568 | Coral Premium 9 |
| Our rating | — | — | — |
How we sourced these numbers: All specs are taken directly from each manufacturer's published product page (links at the bottom). We have NOT independently lab-tested these brands — only Prime Water (our own sister brand) is verifiable through primewater.com.sg. Independent lab testing is rolling out through 2026.
Verdict
Cost over 5 years: Coral Premium 9 saves S$ 832 over 5 years.
Lab performance: AlkaViva H2 Athena produces 0.92 ppm dissolved H₂; Coral Premium 9 produces 0.1 ppm. The AlkaViva H2 Athena leads on hydrogen output.
Warranty: AlkaViva H2 Athena carries a 5-year warranty; Coral Premium 9 carries 2. AlkaViva H2 Athena wins on coverage.
Where to buy + showroom info
AlkaViva H2 Athena
Online · ships internationally
Lineup: H2 Athena (5p) · Vesta H2 (8p) · Delphi H2 (7p)
Visit AlkaViva →Coral Premium 9
Direct retail
Showroom: Block 37 Defu Lane 10 #03-41, Singapore 539214
Phone: +65 6239 5335 · Sales +65 8761 6868
Lineup: Premium 9 Slim ($3,413) · 9 H Plus ($4,949) · 9 Compact ($3,168) · 9 H ($2,968) · 7 ($1,968) · 5 ($1,688) · 4 ($949)
Visit Coral Pure Natural Pte Ltd →No affiliate links · Waterionizer.sg earns zero from either purchase.