Well , im new to hydro growing ... but going to give it a try. What is the timer for ?? Does the air pump stay on 24/7 or what ??

I see they come with timers , but dont know what they are timing ??

Anyone able to help ??
kmac9119 Reviewed by kmac9119 on . New to Hydro growing ... Quick question... Anyone help please? Well , im new to hydro growing ... but going to give it a try. What is the timer for ?? Does the air pump stay on 24/7 or what ?? I see they come with timers , but dont know what they are timing ?? Anyone able to help ?? Rating: 5