Editing Hydroponics (section)

====Equipment====
Chemical equipment can also be used to perform accurate [[chemical analysis|chemical analyses]] of nutrient solutions. Examples include:{{sfn|Douglas|1985|p={{pn|date=March 2025}}}}
* [[Weighing scale|Balances]] for accurately measuring materials.
* [[Laboratory glassware]], such as [[burette]]s and [[pipette]]s, for performing [[titration]]s.
* [[Colorimeter (chemistry)|Colorimeters]] for solution tests which apply the [[Beer–Lambert law]].
* [[Spectrophotometry|Spectrophotometer]] to measure the concentrations of the key parameter nitrate and other nutrients, such as phosphate, sulfate or iron.
* [[Containers]] for growing and storing the plants.

Using chemical equipment for hydroponic solutions can be beneficial to growers of any background because nutrient solutions are often reusable.<ref name=Reuse /> Because nutrient solutions are virtually never completely depleted, and should never be due to the unacceptably low [[osmotic pressure]] that would result, re-fortification of old solutions with new nutrients can save growers money and can control [[point source pollution]], a common source for the [[eutrophication]] of nearby lakes and streams.<ref name="Reuse">{{cite journal|last1=Kumar|first1=Ramasamy Rajesh|last2=Cho|first2=Jae Young|title=Reuse of hydroponic waste solution|journal=Environmental Science and Pollution Research|date=2014|volume=21|issue=16|pages=9569–9577|doi=10.1007/s11356-014-3024-3|pmid=24838258|bibcode=2014ESPR...21.9569K }}</ref>