When and what ferts to start hydro

HOWS ITS GOING RIU I HAVE A QUESTION I JUST PURCHASED A BUBBLEPONICS SETUP AND IM WONDERING WHEN I START MY FERT SOLUTION RIGHT AWAY AS SEEDLINGS OR DO I WAIT A WEEK OR TWO UNTIL THE SPROUTS GET BIGGER?

IN CONTEXT WITH THAT WHICH FERTS DO I START AT WHICH TIME?

I HAVE Jacks Classics 30-10-10 with micronutrients,
flowering i have Green light Super Bloom 12-55-06 0.10% chelated iron
i also have packets of stealth hydro micro nutrients. ive bin reading alil on ferts and came across people abusing high phosphorous ferts should i get a 10-30-10 or should i stick with what i have its a pretty big bottle lol... any advice and comments would be greatly appreciated thanks

Use very little of your jacks classic at first, what you want for the veg stage is nitrogen, that is the first # in 30-10-10 ( N= Nitrogen, P=phosphorus, K = potassium). Plants use more N in veg than P or K, but in flowering use more K and P, use the superbloom stuff after you have turned the plants over to 12/12 flowering stage. Use less than you think you should.