Uploaded November 2014 | Updated September 2026, 2 weeks ago
When growing in recirculating active hydroponics systems you need to change out your nutrients frequently—but how do you know when it's time to drain away your spent nutrients and start with a fresh batch? We explain everything in four minutes.
When growing in recirculating active hydroponics systems you need to change out your nutrients frequently—but how do you know when it's time to drain away your spent nutrients and start with a fresh batch? We explain everything in four minutes.
