I agree with Chub's as long as your growing in soil or coco coir and hand feed. Either way feeding the Mycos is important through the whole grow. Recharge has what black strap has and more without the mess if you grow in soil or coco.  If you feed from a reservoir or DWC Blackstrap molasses can be real messy and I have not yet found a way to use it without the mess but there are lots of sugar additives for hydro.