Using this calculator http://calc.petalphile.com/ it says to dose 56 ml of API Leafzone to attain EI for my 30 gal. tank. It says to dose these levels 2-4 times pre week. Here's the stupid question. Do they mean dose 56ml 2-3 times per week or over the course of the week? I'm assuming that's per dose but you know....when one assumes etc.