Do I need to add anything to "Super Soil"?

Hi.

I just got back from buying a couple bags of TGA soil…EXPENSIVE! I know I could have made my own for a lot cheaper, etc. But, for me, it's okay that it's more expensive because I don't have to buy all the separate stuff and mix/cook it myself. It's a lot less messy, too. Anyway…it's a lot to pay for dirt mixed with shit! LOL!

But, I'm wondering if I need to add perlite or add some drainage layer of rocks or something at the bottom of the pots. I'm using regular black plastic 3 gallon garden pots.

So, if anyone is familiar with using this soil (or similar), is there anything I need to add to it? Any advice is appreciated greatly! Thanks in advance.

I'm sure it's good to use right out of the bag. 3 gallons seems small to me so you may need to use more super soil or top dress.

I went with 3 gallon size because I'm going to try and grow 6 plants in a 3 X 3 tent. I figured 5 gallon might be too big. From what I have been reading, 3 gallon size is good for a small tent like mine.

Thanks!