My question is how often do you add Zone to the system and In what quantity. I mean if your going for 3 or 4 weeks before draining the system are you adding zone on a regular basis. Especially in the beginning of veg when they aren't using a lot of water. Also are you adding a higher dose to the top off res.
Thanks mittenmedgrow. Im also in MI. So if for the first week and a half say the system only goes through say 10 gallons you are only adding as it needs water and your adding back at the same strength. So I guess Zone does not lose its effectiveness over time.