Originally Posted by SAP420
funny thing is that I didn't precondition at all. I just flushed the hydroton lots with tap water. Then I let it dry out completely and then planted my seedlings in each station. Its funny that you mention that you used tap water to flush your plants. I do that every time with tap water. What I do is I will flush the hydroton of each water farm with a sprayer in my bath tub, then I mix fresh nutes for each station (2 gallons). Then I add ph down to each one. Here with our tap water, I usually use 2 and 1/2 dropper fulls for each station of ph down. Then I check the ph about an hour later to see the true reading. Usually I end up right around 6 which is perfect to me. Been doing it this way for the past 3 grows. Never had an issue. Thanx for your interest! :jointsmile: