HM Digital Waterproof Professional Series pH/EC/TDS/Temp MeterCOM 300L: Waterproof Professional Series pH EC TDS Temp Meter The COM 300L is a professional grade level pH EC TDS Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. Features Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total

This product can be used in both the vegetative and flowering stages

Like all products in the Harvest More line

8" x 40'' Standard Carbon Air Filter

able to grow bigger and healthier

(5) 20 ml packets pH 4 buffer

pH-Up and pH-Down are supplements used to adjust your water and nutrient solutions to the proper pH range for plants

Scissor Scrubber Features:

Don't wait and hope

Most people will

This little pump will raise the input water pressure to 78psi on every GrowoniX reverse osmosis filter up to 600GPD—even if you have only 10psi to start with

This grade of Potassium is formulated for maximum water solubility

HM-500 HydroMaster: EC/TDS