How do I read this water hardness test?
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water quality for espresso machine health? stumped : r/espresso
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Peak Water Hardness Test Strips
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Amazon.com: Hard Water Test Strip for Breville Oracle, Oracle Touch, Barista Touch, Barista Express BES920XL BES900XL BES980XL BES990, Delonghi Part 5532110300 And Other Domestic Espresso Machines,(Pack of 2) : Home & Kitchen
Testing water hardness for new coffee maker - need help reading strip : r/ Coffee
Delonghi Coffee Machine Maker Water Hardness Limescale Testing Strip 5532110300 | eBay
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DeLonghi Coffee Machine Water Hardness Testing Strip 5532110300 Genuine Part x 2 | eBay
Water softening for espresso machines
