haha, yea i work like 12-9, so im always on before and after work, Im just get getting the pH meter, the AG is almost a full gallon, but isnt. PPM is for measuring all the particels in the water, and you would need that if you had over like a gallon in half or somthing rez. As long as you add the right amount of nutes, you should be fine. Im investing in all that once i switch to DWC and a bigger rez, but i might just stay at 3 gallon rubbermain bins