Have a benzoyl peroxide cleanser, a salicylic acid cleanser, tea tree oil, and some aloe vera gel. How can I use these together effectively to treat acne?

May not work. Use the topical benzoyl peroxide as you can tolerate, a daily wash with the salicylic acid, tea tree oil only if you are a female (it's made men grow breasts), leave the aloe vera unused. This will clear you only if your acne is mild. If it's on your trunk is producing scars or isn't gone in two weeks, get with your physician who can add prescription-strength Rx.