Yes...it can. I've never had a problem with it and had never checked it till recently...it was off the scale but the plants looked fine. So I don't check anymore.
you won't have an issue with this at all.. feeding with a SIP is the most versatile there is. you can you can top feed or bottom feed with liquids or top feed with dry, you can mix dry with water and add it that way.. pretty much every way possible.
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