Dont buy that kit for sure!! Your waisting your money, the ph solutions are of the weakest variety and dont bother with the color chart to figure your ph ! joke !! I STRONGLY recomend a ph meter (30$ for a cheap one) and Advanced Nutrients PH up/down is VERY concentrated and worth the money !!! use carefully cuz it dosnt take much.... best advice for nubies I have ... you have to have a ph meter, dont waist your money on general hydroponics!