DL Wholesale is proud to offer the complete line of LTL Controls, Growee, DLI, Link4, Grow1, and Speed Bully Series of environmental controllers for lighting, CO2, ballast timers, temperature and humidity, heating and cooling, and fan speed controllers. All environmental controllers that we carry are expressly developed for use in hydroponic, greenhouse gardening, indoor gardening, and aquaponic applications. Also available are EC / pH / PPM / TDS / Temp Meters and Solutions available by Aqua Master Tools and HM Digital.