Apera GroStar GS4 pH/EC Combo Pen HGC741608 These are the same high-quality

These are the same high-quality trays as the industry-standard Botanicare White Grow Trays

A built-in check valve assures that all the drippers will turn on – when the system is fully pressurized – and off at the same time

automatic shut-off cartridge

9 pints per kWh

the Anden 710 with VLGR delivers the best return on investment when compared to competitive dehumidifiers

Apera GroStar GS4 pH/EC Combo Pen HGC741608 These are the same high-qualityAI21040 GroStar GS4 pH EC 500ppm 700ppm & Temp (5 in 1) Combo Pen Lab grade instruments designed specifically for growers! Includes: 2 year warranty (instrument) 1 year warranty (probe) pH 7 & pH4 calibration solution (50ml bottle each) 2. 77 EC calibration solution (50ml bottle) KCL storage solution (10ml bottle) Lanyard and user manual Features: Measures pH, conductivity (EC and 500ppm 700ppm) and temperature (5 in 1) Compatible with all GroStar