Drip emitters deliver nutrient solution to the base of each plant. Choosing the right ones keeps every plant fed evenly.
Flow rate
Emitters come with different flow rates. Pick one that suits the size of the plant and the medium, and check that each plant receives a similar flow.
Placement
Put the emitter close to the base of the plant, where the medium can carry the solution to the roots.
Filtering
Emitters clog easily. Fit a filter before the pump and check the emitters regularly.