Call us pretty much anytime at (970) 901-5105 (USA). If we don't answer, we will get back to you shortly, typically within minutes-hours or in the morning if you call too early or late. We don't hold hard hours because that is not how life works around here. We are working for you, so sometimes we are working late.

Email me, Mike, the owner directly at mastergrower@oxydoser.com with absolutely any question or concern. You can also send us mail at POB 270534, Littleton, CO 80127.

WE WILL TREAT YOU RIGHT!