Bluelab - PH Pen aqua pebbles providing a robust spectrum that

providing a robust spectrum that closely resembles natural light

​Hoyas & Epiphytic Vines: (Thrive when roots can freely wind and breathe through the open

Removes hot and stale air

Shake bottle well before use

this feed works perfectly to deliver consistent and reliable results

Bluelab - PH Pen aqua pebbles providing a robust spectrum thatA compact and robust user friendly handheld pen which takes measurements in increments of 0. 1 pH and is fully temperature compensated to ensure accurate readings every time. Fully waterproof rather than merely water resistant, the Bluelab pH Pen is designed to float if dropped into a reservoir. Temperature display in C or F selectable. Hold function keeps the pH reading on screen for as long as required. Easy to calibrate, and calibration check mark