@Adcrag yeah aerating you can keep your mix for about 48 hours at least. It depends on other factors too like temperature and light exposure. If cool in the dark I’ve kept my mix good for 5 days before.
What brand of blackstrap are you using? So far your mix is great. I would just add a little bit more phosphorus and potassium myself. GDP loves potassium and it adds to that berry smell it gets from all the myrcene.