keep it simple until you get some good healthy seed to harvst grows down... then worry about gimicks and expensive products that promise things with virtually no evidence to support it, lol....
having a baseline before you try these things will make it more easily discernable whether they actually helped at all.. or just stroking ppl's egos and elying on them avoiding buyer's remorse and recommending it to others, bwahahah..
be systematic about light levels and how you fertilize to start,... keep track of age of plant and power of light / height of light etc etc.. this stuff will be similar each time given same environment. know what you fed... the products you used.. (looks like rockwool / hydro so even easier to do!!)
since oyu are hydro, i'd keep track of you ppms of n/p/k/ca/ mg/ s ... at least calculate it once and doesn't need to be done each time you make tiny adjustments -- you may even play mad scientist with different mixes fo different stages of life. I stick to just affecting conentration while retaining ratios for most part and that works well. sometimes have to dip N in bloom 5-10%, but i am probably pushing N before that point and could easily be a slow buildup too. because i track what i feed, it's super easy to diagnose anything i see and make a quick confident adjustment to a known formula that woks well on 90-percent or more of plants i have geminated.
in my exp the plant's genetics are 95% of it. of the other 5%, it is mostly us not stepping on our own dicks (or flaps).