Editing Hydroponics (section)

====Common equipment====
Managing nutrient concentrations, oxygen saturation, and pH values within acceptable ranges is essential for successful hydroponic [[horticulture]]. Common tools used to manage hydroponic solutions include:
* [[Electrical conductivity meter]]s, a tool which estimates nutrient ppm by measuring how well a solution transmits an [[electric current]].
* [[pH meter]], a tool that uses an electric current to determine the concentration of [[hydrogen ion]]s in solution.
* [[Clark electrode|Oxygen electrode]], an electrochemical sensor for determining the oxygen concentration in solution.
* [[Litmus paper]], disposable [[pH indicator]] strips that determine hydrogen ion concentrations by color changing [[chemical reaction]].
* [[Graduated cylinder]]s or [[measuring spoon]]s to measure out premixed, commercial hydroponic solutions.