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the fox farm blig bloom has bat guano, not sure what kind, you should get the 3-pack nute set, can never go wrong with fox farms. Otherwise look...
let it do it's thing until you sex it.. I think of it as a lot of training and/or topping you don't have to worry about if it keeps growing like that.
usually around 2 or 3 weeks after the light cycle change will they show their sex.. As for your fears the little ones size, they will double,...