No, no other nutes at all. Just plain water until 2 days ago, then very weak 3 part. I'm basically commited to it, but I'd like to spread out my expenses. Starting from zero is a pretty steep expense in total. Decent lighting and RO system is next, and that'll be around $500 or so total. I was hoping to get by using my standard water with the hardwater micro. Maybe when the plants get bigger and I use more of it, it'll help with the PH as it's been reported to by many sources.
I do plan to get a supply of calmag once I do get clean water though, definitely.
I'll monitor things very close until next weeks' res change before deciding to spend the extra sooner rather than later. I know it's worth it.