Its suggested to change the res every 7 to 10 days. I have never let my water set out over night or whatever. Straight into the res add my nutes then adjust Ph good to go!

Peace
GodBud Reviewed by GodBud on . Question about changing water I have a hydro system made out of a rubbermaid container and two bubbles stones. My question here is, how often do i change the water and put new nutrients, and along with that do i actualyl have to let the water sit out for a day or two to get the chlorine and other stuff thats in it to evaporate?? Rating: 5