Toss 1tsp of plain epsom salt in your next gallon of water & let it dissolve before adding your big bloom & tiger bloom. Start using it next time you feed. Use what’s recommended on the big bloom, and use the lowest recommended dose on the tiger bloom for the first 2 weeks. Then Up the tiger bloom. I’d use the Epsom at least once a week if using led lighting.
Feed the fox farm every 3rd watering. If she wants more, switch to every other watering rather than upping the dosage.
Worked well when I used it.
edit: You’re about 9 weeks out.