Emperor 24 Hour Timer

Emperor Thermometer / Hygrometer combo

Garden Controls Cooling Thermostat Controller

General Hydroponics pH Test Indicator

Green Gold CO2 Regulator

GROTEK PH Test Strips

GroZone CY2 – Cycle Timer Short period Cycle Timer with photocell

Grozone SCO2 0-5000 ppm CO2 Controller

Hanna HI98128 pHep5 pH/Temperature Tester

Hanna Instruments Gro’chek On-Line Monitoring System

Hanna Instruments pH Tester (HI-98107)

HM Digital Monitors, DM-1: In-Line Dual TDS Monitor

HM Digital TDS-3: Handheld TDS Meter with Carrying Case

KFI 425S with 4" Flange

Kootenay Filter KFI 1000GL with 6" Flange

Kootenay Filter KFI 425 Bayonette Style, Flange Not Included

Luster Leaf Rapitest Digital 3-Way Analyzer

Milwaukee CD600 TDS Economical Pocket Tester

Milwaukee T75 Waterproof TDS Tester

Nutri+ Florasol Calibration Solution pH 4 Adjuster