Update README.md

README.md

@@ -3,7 +3,7 @@ Efficient neutrient file technique hydroponic system with particle photon and ul
 
 ## Introduction
 1. In traditional system the neutrient pump needs to be ON all the time so that the neutrient keeps flowing, because of this the pump burns out soon and needs to be replaced.
-2. In the new particle photon based system the neutrient is pulled down by gravity from the upper reserviour and then once the upper reserviour is empty then only the neutrient pump starts which pushes neutrient in upper reserviour from lower reserviour this saves electricity and also the neutrient pump lasts longer as it is ON only for some time.
+2. In the new particle photon based system the neutrient is pulled down by gravity from the upper reserviour and then once the upper reserviour is empty then only the neutrient pump starts which pushes neutrient in upper reserviour from lower reserviour this saves electricity and also the neutrient pump lasts longer as it is ON only when required.
 
 ## Roadmap
 | No | Feature      | status |