I don't have massive calves but I have big calves for a person that has been bodybuilding for only a year. They are 17+"...like I've said not massive.
Work them out once a week but work the shit out of them and do 20-25 nice, heavy, flexed reps for 4 sets. Do two different exercises like that one seated and one standing
you dont need juice you need workouts for calfs
Genetics plays a big role in calves development, but I usually work them twice a week.