All i can say is running mine at 3 grams per gallon wasnt enough phosphorus by the time I hit the third week after preflower(first hairs on day 18)...problem was at that point i would get clawing on the weaker feeder so i was feeding both the stronger and weaker feeder the same...even at 3.5 grams per gallon deficiencies were coming on the weak feeder around day 35.
The weak nitrogen feeder though, i jumped all over it with calmag and GP massive when i noticed a couple of leaves starting to follow suit of the heavy feeder, and has not progressed at all, so i know i am doing the right thing.
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