I am at day 20 of flowering and was going to pick up a few needed things and was wondering if I should be picking up some extra supplements to increase or make a healthier yield?

I currently am only using RO water, GH 3 part, and calmag+. I'm not looking to do anything experimental or difficult. Just wondering if there's any "must have" or "highly recommended" flowering supplements?
MisterE Reviewed by MisterE on . Supplements for flowering? I am at day 20 of flowering and was going to pick up a few needed things and was wondering if I should be picking up some extra supplements to increase or make a healthier yield? I currently am only using RO water, GH 3 part, and calmag+. I'm not looking to do anything experimental or difficult. Just wondering if there's any "must have" or "highly recommended" flowering supplements? Rating: 5