more yeild is always better

(especially if it is as simple as changing out a res, I change my every 7 days, sometimes I'm lazy and I top it with straight water when the water levels get down low from evaporation)


The only problem I can see with that type of setup is if your water levels go down low, it doesn't mean the nutes are even half used up. So if you keep topping up on the res, and adding more nutes, sooner or later, your ppm will be WAY too high, and probably kill them. That is, if you don't use a ppm meter. I don't. I don't even use a temp guage. All i need is my PH kit, and I'm all good. I could probably do way better with the extra equipment, But I think you can do fairly well without most of it. But PH is a must. You can always under/over feed a bit with not much problems, or none at all. Also it is good to change out the res just to have cleaner water. plants release alot of stuff back into the water too, and bacteria can take hold, along with buildup crusts within your res. just seems dirty to me