Yeah mate im with CC on this to get real good effects of deca i personaly think 12 at lest.. and you always want to have the test running longer than the deca around 2 weeks as deca can casue well "deca" dick lol some people get it some dont but best to be safe. also should lean more read lots of info about any drug before you use so you dont come into problems such as like i said DECA DICK. but stick with the test for now add the deca next go around after you learn a bit more about it wont take long mate great gains so far doe