A whole house filter removes sediment and reduces chlorine; it doesn't remove hardness. A salt-based water softener swaps calcium and magnesium for sodium, removing hardness but adding salt and needing regeneration. Salt-free scale control doesn't remove minerals but reduces scale build-up. In hard-water cities, many homes pair a filter with scale control.
- Filters and softeners solve different problems.
- Salt softeners add sodium and need salt top-ups.
- Scale control reduces build-up without salt.
Side by side
| Whole house filter | Salt softener | Salt-free scale control | |
|---|---|---|---|
| Removes sediment | Yes | No | No |
| Reduces chlorine | Yes (carbon) | No | No |
| Removes hardness | No | Yes | No (changes how it behaves) |
| Reduces scale | No | Yes | Yes |
| Needs salt | No | Yes | No |
| Adds sodium | No | Yes | No |
Which is right for Adelaide, Brisbane and the Gold Coast?
Adelaide's water typically measures 87–136 mg/L hardness. Brisbane averages about 118 mg/L and the Gold Coast about 40 mg/L, so most Gold Coast homes don't need scale control at all (Seqwater, 12 months to August 2026). For most Adelaide homes, a filter plus salt-free scale control (our Whole Home Pro) handles chlorine, sediment and scale without salt or drain water. Very hard bore water can justify a softener. See hard water in Australia.
Questions
Does a whole house filter soften water?
No. Sediment and carbon stages don't remove calcium or magnesium.
Is softened water OK to drink?
It contains extra sodium. Many households keep an unsoftened tap for drinking.
Written by the Whole Home Water team and reviewed against the Australian Drinking Water Guidelines. General information only; your Home Water Check gives advice for your home.
Plumbing and installation details reviewed by a licensed plumber. See our editorial policy.