We Hydroponics

... Nutrient solution to Hydroponic is just like fertilizers to soil... Essential

See an ultimate guide here

Always check the pH and EC/TDS in your system. Best choices for hydroponics

ECO209 - Continuous pH monitor

AD11 - pH/Temp pocket tester

http://www.adwainstruments.com/.../professional.../82-ad11

 

AD32 - EC/TDS/Temp pocket tester

http://www.adwainstruments.com/.../professional.../85-ad32