The guy who sold all that stuff to you obviously didn't advise you on much........IMO...you're not even close to being able to use any of those new acquisitions.....you didn't mention what you have your seedling in but it needs NO nutes for another week or two and then only if it's healthy. Health will be determined by if you let the roots seek moisture instead of overwatering among other things..... FFOF already has nutes in it that will suffice for several weeks; personally I only use nuteless soil..........Bio-Grow is an excellent aid once the seedling is healthy, then only lightly.....you've got weeks before anything else is even uncapped.......
I use all the biobizz lineup with spectacular results but I start nothing until my seedling is well established around 2-3 weeks. A good watering schedule and patience is very necessary at this stage.