YES! The FAS-DPD is the critical component in the test kit. It is used for the chlorine tests. Call them and tell them what happened and ask them to rush you a new kit. Also, ask them to send you a postage paid return label so you can return the defective kit to them at no cost to you. This is only the second time we have heard of this happening this year and we have recommended that hundreds of people buy it. OR ---- if that is the only thing wrong (and you don't mind cleaning the spilled powder out of the box), ask them to just send you replacement FAS-DPD powder.