The NDS Etatron eOne MF Micro-Doser can dial down to 0.25 mL per gallon. It accurately doses super-concentrated products into an existing fertigation system. Designed to be in unison with the NDS.
ETATRON eONE Micro-Doser - DIY KIT 1 1/2 in - Etatron eONE Micro Doser KIT