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Sera kH-Test 15ml

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Easily monitor the carbonate hardness in your tap water and find your optimal filter setting for your Peak Water Jug.

Please note, each drop used when testing your water is equal to 1 dKH/18ppm. Add up the number of drops used to turn the water from blue to yellow, then times that number by 18 for the ppm result.


USA customers: Unfortunately, we can't ship to you from this store. Please visit our USA partner to purchase Peak Water.


We use Royal Mail 48 for UK Shipping, prices start from £2.50. Customers can opt for our premium, tracked service via DHL at checkout.
All International orders will be shipped via Royal Mail Standard International or DHL if selected.
Orders placed on a weekday will be shipped next business day.

2 Filter Pack

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