Choosing the right system
Choosing a water softener for hard water
Hard water is high in dissolved calcium and magnesium. It isn’t unsafe, but over time it scales up pipes, kettles and hot-water systems, spots your glassware, and makes soap struggle. If that sounds like your place, a softener or scale reducer is the fix. Grewa doesn’t make one yet, so this covers how to decide and what to look for.
How to tell you have hard water
- White, chalky scale around taps and in the kettle.
- Spotty glasses and shower screens.
- Soap and detergent that won’t lather well.
- Hot-water systems and appliances that fail earlier than they should.
Softener vs scale reducer
A traditional ion-exchange softener actually removes the hardness minerals (swapping them for sodium), so you get properly soft water, it needs salt topped up and a drain. A scale reducer or conditioner doesn’t remove minerals but stops them sticking as scale, no salt, no drain, but the water isn’t truly soft. Which suits you depends on how hard your water is and whether you want the full softener experience or just scale protection.
Sizing it
Softeners are sized to your hardness level and household water use so they don’t run out of capacity between regenerations. Have your hardness number (from a test) and your household size ready.
How to find the right one today
Test your hardness, then search along the lines of "water softener sizing Australia" or use this prompt:
I think I have hard water in Australia. A test read about [X] (or my water is [ppm or grains] hard). My household is [N] people. Should I use an ion-exchange water softener or a salt-free scale reducer, what capacity or size should it be, and what are the running costs and maintenance of each?
Where Grewa fits
Water treatment is on our roadmap. For now, if hard water is scaling up your system, sorting it protects your pump and every appliance downstream, and we’re glad to help you think it through.
Common questions
Is hard water bad for me?
No, it’s safe to drink and the minerals are harmless. Softening is about protecting your plumbing and appliances and getting better lather, not health.
Softener or scale reducer, which is better?
A true softener removes the minerals (needs salt and a drain); a scale reducer just stops them sticking (no salt, simpler). Very hard water usually justifies a softener; mild-to-moderate hardness is often fine with a scale reducer.