Fake urine is way to go , monkey pee, comes with temp gauge and warmer, fits in briefs.
Sounds as though you’ll be fine. Don’t give your first pee, have plenty of water, your ‘golden’ :)
I use fox farm as my base soil and add dry amendments, let it cook for awhile. Even after adding these amendments, I top dress at week four. Ocean forest isn’t meant to maintain your plants through full 12 hour run.
We can’t do much for you without the blurrples off. What lights are u using