Look for the carbon at the fish area of the store u know where they sell those little fishies. Around the cleanin or set up toys for fish tanks just look they should have them but just dont walk out with carbon,soil and grow lights looks a little suspisious buy one item at a time and make sure you come up with a excuse when they ask what it is for. uuuuhhhhhhhh tamatoes .....sir you dont need a drip system for tomatoes. dont park in front of the shop cause they can get your liscense plant number look in the FAQ gettin Started this will give ideas not to look suspicious.