Has anyone ever refilled their nutrient bottles with anything but grow nutrients and tried it???
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Compare dosing is the most I have done with my empties
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What do you mean? You filled them with other nutes and tried to feed a second plant the same amount the grobo was dosing a growimg plant of the same age?
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No sorry I didn’t mean it that way. I compare empty bottles that I marked from the last grow to current. I never put anything in them.
Hope this makes sense now 
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Got ya, I get it now. Have you done it in the same recipe and was it the same dosings? Did it actually dose the same
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Bottle 3,4,5 with 2 different recipes dosed very close to the same
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