we have a hova-bator still air, on day 15. we hand turn 2xday. anyway there is a tray for water on first half you fill until 3 days before you fill the other tray plus the first one to raise humidity. my question is, i fill the first one half way and just fill as needed, is this enough? i probably am worrying for nothing im sure. things seem to be going well i just thought i would ask the pros!! i just cant wait!!!!!!!!!!!!