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One silly question... What does NPK ratios stated here either by fatman or others refer to? Is it N: P:K or N: P2O5:K2O?

Thanks for responding.. Actually I am very new to hydroponics and in India we don't have companies manufacturing nutrients specifically for hydroponics. GH is available through Amazon but very expensive. So I thought I will try to make nutrients my self. Upon searching net most recipe was by...

Hi, Can the veg formula be used for veggies like swiss chard, spinach etc.. basically all leafy greens. BTW anybody knows where is FatMan..?????????