[Question] Nutrient schedule for tomatos with Advanced Nutrient Grow, Micro, Bloom

I’m making my first bubble bucket to grow some beefsteak tomato’s and basil. I recently purchased Advanced Nutrients 3-stage Grow, Micro, Bloom, but I’m not sure how much to use. My buckets have about 3 gal of water in them. How often should I be using nutrients, and should I always mix the same ratios or change it later in the growth cycle?