33% drop
CAIJIEXI 1* Gray Aquarium Fish Tank Water Hardness Tester GH/DH Water Quality Test Pen
$5.79$8.60(-33%)
- Accurate Water Hardness TesterThis gray aquarium fish tank water hardness tester is equipped with a chip, titanium alloy probe, and a highdefinition LCD screen, precise and reliable measurement
Set alert threshold:
10%