pk13/14 and shooting powder help needed

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hi, can anybody help, my first grow with hydroponics and all is going really well. coming up to 4th week of flowering and am unsure about adding pk13/14 for one week then adding shooting powder straight after that. dont want to over do things at this stage. can anyone explain the correct way and times to get the best from my plants. many thanks

first off, welcome to the boards! what nutes are you using other than the pk13/14?

what brand shooting powder?


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