no. light warrior is also used as a soiless media it is so much peat and without any nutes gut the gentlest, worm castings with a 1-0-0 and used mostly for the beneficial microbes. Happy frog is a soil with less peat moss compostion and more fert, even batguano. It is a full on soil, true tho they do sell a soil conditioner to beef it up. Just use what the labels say to. Light warrior goes a long way to start seedlings. A bag lasts forever. Or go to lowes and buy some seed starting mix for 2 bucks.
that guy was just trying to save you some money. when you sell all that you all the ways you can cut corners. They work but always an easier way.
Lightwarrior sure is beautiful mix tho.