Hey there!
I also use BiobBizz.. AllMix (substrate) and the full BioBizz line
With pretty good results, and very important, no quemicals and great flavour.
If you don't wanna buy the whole line you could start with a starter pack or buy at least the three main Nute's; Bio Grow, Bio Bloom and Top Max.
If you want extra quick growth during veg use Fish Mix instead of Bio Grow.
If you wanna do even more good to your plants you can buy Bio Heaven and Acti Vera, those are suplements.
Alg-a-Mic is also a great product to reduce stress after a transplant or HST for example or to bring your plants back in shape after an overdose of nut's.
Nothing negative to say about BioBizz, only GoodStuff!
Oh, and it is very easy to work with, you dont even need to take EC and PH if your water is ok.
Good luck choosing!
Peace ✌️