I agree. I burned the crap out of a couple feeding what I thought was the recommended amount, but was essentially double. Turns out I was reading the chart wrong and was giving the full weekly nutes every other feed (essentially double). They did recover fine after I got some more gray hair and like two hours of flushing.
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You need to add the 3rd of the trio…Grow Big the nitrogen source. Ideal PPMs will be 900-1000. Trying to hit the FF scheduled PPMs any higher than that requires all the added nutrients they have listed but not needed 
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