pH/EC/TDS Meters & Solutions

General Hydroponics® pH Down Liquid

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

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.

Features:
• Measures pH, conductivity (EC and 500ppm/700ppm) and temperature (5-in-1)
• Compatible with all GroStar replacement probes: pH, Soil pH, EC and PH/EC Combo
• Premium probe technologies and materials ensure high accuracy and durability with

Bluelab® pH Probe KCI Storage Solution

Hades Down

GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

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

The HI981421 GroLine Monitor for Hydroponic Nutrients provides around-the-clock, continuous monitoring of pH, conductivity (EC & TDS), and temperature in hydroponic nutrient solutions. Quick to setup, simple to use, this monitor was designed with Hydropon

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

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

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 Replacement pH Probe

Bluelab® Probe Care Kit for Conductivity Probes

Bluelab® ppm Pen — Now Bluelab® Conductivity Pen

Bluelab® Multimedia pH Meter with Leap™ pH Probe

Emerald Harvest® pH Up
Keep your nutrient solution in the sweet spot with Emerald Harvest® pH Up.

Emerald Harvest® pH Down
Keep your nutrient solution in the sweet spot with Emerald Harvest® pH Down.