In my opinion you'll need a more robust pump. 6mL/min = 1-1/2 cups/hour.
It will be easier to use regular line voltage e.g. 120 VAC.
Timer $13.58: Grasslin by Intermatic Timer, heavy duty, grounded, for ACs/heaters, 125V, 3 on/off settings
Mfr. Part#: TN311, Allied Stock#: 70132087 Allied Electronics...
Pump @ $12.95: WA65 Mini Fountain Pump<br>(PT707, PT808, PT909, PT1020, FT70 <br>Replacement Pump)
66 GPH is >1-GPM so rig a bypass loop with a valve such that you can control the flow to your sprouts.