I'd drain and re-up your nutes including the zone. Balance er out and let er rip.
Zone will kill off of your beneficials and enzymes. Add Zone to the res before you add your nutes. 1ml per gallon is a good place to start up to 2.5ml per gallon if you are having problems.Jack/UCMENOW
If I'm using Hygrozyme and I want to switch to zone do I need to do a completle res change or can I just start topping off my res using zone? I haven't changed my res in 3-4 weeks so I don't know if there's any zyme left in there. My system is rock stable and don't want to mess with it unless I have to. So at what level do you use zone 1-2ml/gal? and do you add to daily top off or do you add weekly?
I dont doubt itI wonder how it would be to go a full cycle without changing the water.
I bet its completely possible.