Iv'e been using potting soil from hardware stores. Results are ok. Iv'e been looking at some different ones and thinking about trying something new in hopes to get bigger yields. Some of the few are, sunshine mix1, coco blend black gold, happy frog and light warrior. Can anyone give me some feedback on what has worked well? It's all more expensive than what I use. I'm wondering how much of a difference I would see in the plants?