JBL ProAqua Test GH General Hardness for the quick, reliable and accurate determination of the total hardness in fresh water and garden ponds. It corresponds thereby to 1 drop = 1 °dGH. Colour change from red to green.
- Oscar L. wrote about JBL ProAqua Test GH General Hardness in February 2020:
Very precise measuruments with affordable price. Also, the refill-package is handy and cheap, if you run out of reagent.
* * * * * = 5-star product
SERGEY B. wrote about JBL ProAqua Test GH General Hardness in February 2020:
Это точный тест постоянной жесткости аквариумной воды!
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