Enter promo code HYDRO in the promotion code box at checkout to receive the discount on qualifying purchases. Limited quantities are available and are distributed on a first come, first serve basis. Promotion is valid until 12/12/2016 at 11:59PM PST/PDT. Promotion is only valid on boscia.com and only available to U.S. addresses. Not valid on previous purchases or purchases of gift cards. Cannot be used in conjunction with other promotion codes and cannot be combined with redemption of boscia rewards. We reserve the right to substitute any free item offered with an item of equal or greater value. Expedited shipping options are not available for this promotion. Limit one promo code use per person, per household. We reserve the right to cancel any order due to unauthorized, altered, or ineligible use of offer and to modify or cancel this promotion due to system error or unforeseen problems. The promotion is NOT valid for all kits/sets.