To bulk up increase your sets to 4-6, reps -15-4
Do do not have to take supplements to increase your size, if you est right
To bulk, consume 2-2.5grammes of protein per Kg (2.2Lbs) that you weigh per day
example 2grammes /your weight - 145Gr of protein per day
example 2.5grammes /your weight - 182Gr of protein per day
Taking supplements decrease the time it takes to achieve your results
Supplements to consider for bulking
BSN Cell Mass - creatine
BSN True Mass - weight gainer
BSn Synthia 6 - 6 in 1 protein
Taking the above mentioned stack, you should achieve your goal in 4-6 weeks
not taking the supplements, should take 10 - 12 weeks, if you lift hard