Well, it's not that I'm drying up. I'm using an ebb and flow system and there is plenty of water available to fill the grow tray. It's more a matter of nutrient fluctuation. I know if I re-add the evaporated water, this is going to dilute my nutrients and bring my ppm level down. Is the proper response to add more nutrients to bring my PPM level back up to maintain a constant volume of water and a constant ppm level, or should I wait for the next time I change water completely, which I've been doing approx every two weeks.
I'm just concerned with overfeeding. Sounds like maybe I should attempt to maintain a constant water level and ppm. I'm basing my nutrients on a 20 gallon tank.
thanks