Hydro vs soil, zkittles auto

All right !!! Here we go again, this time I will do a comparison grow between soil vs hydro. Seeds come from the seedsman prize of newbie of the month (thanks seedsman !). It's been like 10 days maybe since i put my germinate seeds in their respective growing medium, and you can already see a huge difference. Hydro is much bigger than soil, and I haven't put the airstone !! I will start oxygenating the water this week, I just didnt want to put too much stress on the plant for the first days. I lowered a bit the pH with lemon juice, but I dont have a way to check the ph nor the electroconductivity of the water so i'm just doing some math for now. See ya ! Ferid