Compare systems. Keep the differences in view.
A cartridge housing, a carbon tank and a multi-media system are different purchases. Start with the job you need done, then compare the exact model.
Compare AquaOx modelsNamed models, published specifications.
Manufacturer information reviewed October 8, 2026. This is a comparison of published specifications, not independent head-to-head testing. Models and terms can change.
| Model & source | System type | Published flow | Upkeep & capacity | Warranty |
|---|---|---|---|---|
| The AquaOxAquaOx specifications | Backwashing multi-media tank | 15 GPM peak; confirm treatment flow for your application | Backwashing, checks and eventual media replacement; additional stages have their own upkeep | 10 years for tank and control valve; see written terms |
| Aquasana Rhino (WH-1000)Aquasana product specifications | Tank system with pre- and post-filtration | 7 GPM rated; 14.6 GPM peak for the base unit | Replace pre/post filters; published main-system capacity of 1,000,000 gallons or 10 years | 10-year limited warranty |
| Express Water Heavy Metals (WH300SCKS)Express Water product specifications | Three replaceable filter stages: sediment, KDF and carbon block | Published 0.25 gallons/second (15 GPM); not labeled as a contaminant-tested rated flow | Published cartridge interval: up to 100,000 gallons or 6–12 months, depending on conditions | 1-year limited warranty |
| Crystal Quest SMART (9–13 GPM)Crystal Quest product specifications | Multi-media tank system; configurations vary | Published 9–13 GPM range; confirm configuration and tested flow | Published media capacities of 1,000,000 or 1,500,000 gallons by configuration; confirm maintenance schedule | Request the terms for the selected configuration |
| Culligan DIY WH-HD200-CCulligan DIY product specifications | Filter housing; cartridge sold separately | Published up to 10 GPM; depends on cartridge and conditions | Cartridge life depends on the cartridge selected and incoming water | 2-year limited warranty |
Peak, rated and production flow figures are not interchangeable. A high peak-flow figure does not establish equivalent contaminant reduction. Manufacturer gallon capacities are not a controlled comparison under identical water conditions.
When a simpler option is enough.
If your concern is sediment, a correctly selected sediment cartridge may be sufficient. If you only want to treat drinking and cooking water, a suitable point-of-use system may meet the need. Hardness calls for a softening decision, not simply a larger filter.
Decide whether whole-house filtration fitsWhen to consider a media tank.
A tank system may suit buyers who want treatment across the home and a different maintenance routine from cartridge replacement. Compare the required drain, power, media replacement and any additional stages before deciding.
Build your ownership estimateBring us your water report.
We can discuss the model, treatment configuration and supporting documentation for your water. No filter should be selected on its media count alone.