Sorry I could not resist the perfect opportunity to use my new pic, lol...

Soilless and hydro are treated the same.
If you are using simply perlite/vermiculite be prepared for all the water testing and tweaking that hydro growers endure.
You must use fertilizer.
The misinformation re: the appropriateness of that Schultz crap for growing cannabis shoudl be ignored. In veg, you need higher nitrogen. In flower, you need higher P but the N in that walmart shit is WAY too high for flowering.
If you are going soilless you have even MORE need to buy cannabis-specific fertilizers.
If you want to use cheap ferts, start with a compost mix that is more forgiving.