Bluelab Combo Meter calibration solution K₂SO₄ is rarely found in

K₂SO₄ is rarely found in a pure form in nature

Hydroponics farmers and newbies love this solution

It sends the plant a strong signal that it is coming to the end of its life

The Co2 Canister is an all natural CO2 generator made from 100% organic ingredients

Shake bottles well before each use

Bluelab Combo Meter calibration solution K₂SO₄ is rarely found inBluelab Combo Meter The Bluelab Combo Meter measures pH, conductivity and temperature in nutrient reservoirs, run off and water supply. Whats more, this meter can be used on the go, giving you fast and accurate readings when and where you need them. The fundamental parameters of pH, conductivity and temperature all play a pivotal role in driving optimal plant health. By regularly measuring the fundamentals, this meter will enable you to optimise your