my friend has a bottle of deca 300, he is about 5 ' 9 165 lbs, already cut and has the frame of a defined body, bulky, hes 21 but if u saw him ud think hes 12, ya know what i mean, hes cycled before but he asked whats the best shit to stack deca 300 with to gain about 15 - 19 pounds of muscle, i already told him that hell blow up takin the 300 but he should stack it cause deca , when stacked acheives good results. my friend is a certified personal trainer but doesnt know the indept info that this website provides about juice. any tips i could give him? o yeah whats a good anti estrogen to take when comin off the cyle of deca 300 and whatever he stacks it with? i told him to stack it with test, but what do guys suggest.