The software and basic electronics (that generate 2 to 16 channel pwm signal ) will remain same, but you'll need NEMA17 stepper motor compatible driver (like DRV8833) and additional power for them.Just wondering if the dosing pump section ever got setup to use nema 17 motors? Im looking at this to run my planted tank/ not a reef tank. but a friend is wanting to set up a hydroponic greenhouse garden. I remembered looking at this like a year ago and thinking it was a good idea, but new to electronics. now I feel comfortable doing this to my tank. I just remembered this cause he was wanting to automate his garden and this came to mind. control lights\fans, and dosing fertlizers.