Digital LCD pH Meter Water Aquarium Tester Pen desktop farm The centre of a clay

The centre of a clay pebble is honeycomb to make it light weight and the outside of a clay pebble is covered in a thin layer of solid clay making them suitable for use in hydroponics

5V AA alkaline / Approx

Solubility: Fully water soluble

Temperature & Humidity Sensor

The Checktemp® offers NO breakage

Digital LCD pH Meter Water Aquarium Tester Pen desktop farm The centre of a clayFeatures: The ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. Comes with calibration screwdriver and 2 sachets of buffering solution for calibration. Introduction: This digital pen style PH meter is an ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food & beverage, etc. Applied range: the production and drinking of purified water, Electroplating