pH/EC/TDS Meters & Solutions

Olympus Up

Hades Down

The HI98318 is our latest pocket meter for measuring the EC/TDS of a hydroponic nutrient solution. This modern looking meter is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. The HI98318 has a very large easy to read LCD displa

HI7004-023 is a high quality pH 4.01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper-proof

Bluelab® ppm Pen — Now Bluelab® Conductivity Pen

CES pH Up™

Concentrated pH adjustment liquid, alkaline buffer raises water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pure water or nutrient solution, at small intervals. Note beginning reading and then test pH. Re

Bluelab® pH 7.0 Calibration Solution

Bluelab® pH 4.0 Calibration Solution

The HI1285-9 inline multiparameter probe measures pH, EC/TDS, and temperature in one convenient, rugged probe. Use with the HI981421 GroLine Monitor to provide around-the-clock, continuous monitoring of pH, conductivity (EC & TDS), and temperature in hydr

HI7061-023 is the GroLine general purpose cleaning solution that can be used for a variety of applications. Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer. Hanna's cleaning solutions eli

PH UP
When Your pH Is Too Low, You Need pH-Up
-- The Highest Concentration in Hydroponics!

PH DOWN
When Your pH Is Too High, You Need pH-Down
-- The Highest Concentration in Hydroponics!

Bluelab Original Truncheon® Nutrient Meter

Bluelab® Multimedia pH Meter with Leap™ pH Probe

Bluelab® pH Pen
Measures pH and temperature.

General Hydroponics® pH Up Liquid

General Hydroponics® pH Test Kit

General Hydroponics® pH Down Liquid

General Hydroponics® Meter Calibration Solutions

Keep your nutrient solution in the sweet spot with Emerald Harvest® pH Up. A pH reading below 5.5 is considered too acidic for most hydroponic gardens. This premium pH alkalizer allows you to raise the pH of your nutrient solution.