When to change water?

Hello fellow growers. I hope everyone is going well. I’m currently growing northern lights auto seed. I’m on day 2 of 14 of early vegetation. Should I wait for grobo notification to do drain and refill? Or should I just do it now? Again, it’s an auto seed. I would appreciate any feedback.

Thanks again


You don’t have to wait for the notification, but its best to do a drain/fill every 7 days. Then halfway through the week, do just a fill to top off the reservoir. Once I get to flower, I like to top it off twice per week between fills bc it will be a lot more thirsty then! Best of luck!


Further to chads post which is spot on. Top ups by using maintenance, fill do just that. No extra nutes
Drain and fill triggers nutrients to be checked and redispensed.