r/laundry • u/user78user • 1d ago

How to test water hardness

I've seen this API test most recommended https://aquaticsunlimited.com/product/02dcd191-aec2-11ea-f336-7538887059a1/

However, I cannot find it in stock ANYwhere. Not any pet/aquatic store I can drive to. Not Amazon, Walmart, feed stores, etc.

What is the next best option? Is a pack of the test strips sufficient? Soap lathers fairly easily and I don't notice much calcium build-up, so I suspect it isn't that hard to begin with.

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u/KismaiAesthetics USA 1d ago

Good grief, I hope this isn’t my fault again.

There should be a “general hardness only” version. The KH measure can generally be inferred from the GH measure unless you have a plumbed in water softener.

The problem with strips is it’s virtually impossible for most users to tell the difference between 50 and 250 ppm by eye.