Bluelab OnePen - With replaceable pH, Conductivity (EC) & Temperature Probe Whiteflies Power-free operation: Runs on gravity

Power-free operation: Runs on gravity pressure with no pump

The formula includes crucial amino acids

It gives moisture back to a bag that has dried down and takes it up again when the bag has been open

SKU MB58-01 Square or Slim — Which 1g Should You Use

Active Aqua's chillers are environmentally friendly (they use R410a refrigerant) and are ideal for keeping the nutrient solution in your reservoir at the perfect temperature

Bluelab OnePen - With replaceable pH, Conductivity (EC) & Temperature Probe Whiteflies Power-free operation: Runs on gravityBluelab OnePen With replaceable pH, Conductivity (EC) & Temperature Probe The Bluelab OnePen is the ultimate tool for growers seeking precision and convenience in monitoring essential parameters for plant health. This innovative 3 in 1 device measures pH, Conductivity (EC PPM), and temperature, ensuring optimal plant nutrient uptake. With its ergonomic design and high contrast backlit display, the OnePen is user friendly, allowing simultaneous