nutrients organic chemical

First grow indoors in 3 gallon pots using coast of main stonington blend soil. Manufacturers suggestions is to add nutrients after week 3/4. Was planning on adding fish bone meal but realized i have enough room to add a decent amount of fresh soil to the pot. Should I ???? Add fresh soil to top...

Hey guys, 2nd time growing indoor here. I have a few gallons of Dutch Nutrients A + B, as well as a General Organics GO box with Cal-Mg and things of that nature. Anyone have any experience with either one, or just a general knowledge of nutrients? Would it be safe (or necessary) to use every...