I mean the FF trio will work just fine.. you have to 1/4 or 1/3 dose it even with photoperiods. The doses are extremely high on the bottle and schedule provided. You’ve got cal mag also which I would have recommended if you weren’t using it.
Plants look healthy and good size for week 3..
Highly recommend using a EC meter and pH meter to monitor feedings.
Be careful when you start using tiger bloom it’s quite acidic and can easily push your pH below 6 once mixed up, another reason to monitor and adjust pH each feeding.