What does 0 5 4 mean? i thought it was supposed to be 20 20 20 for npk ratios.

0 5 4 means it has 0 percent nitrogen, 5% phospherus, and 4% potassium. 20-20-20 is 20% all around

Is this suitable for semi-hydroponics? i plan on using leca as the substrate

Yes. This can be used from straight hydro to soil, by following the recommended procedures. Semi hydro should probably be similar, dosage-wise, to straight hydro, I should think.

ASIN	B09M942WYB
Best Sellers Rank	#82,583 in Garden & Outdoors ( See Top 100 in Garden & Outdoors ) #302 in Nutrients & Additives
Brand	General Hydroponics
Brand Name	General Hydroponics
Country of Origin	USA
Coverage	Full
Customer Reviews	4.8 out of 5 stars 3,567 Reviews
Included Components	FloraGro, FloraMicro, FloraBloom
Item Form	Liquid
Item Type Name	General Hydroponics Flora Series
Item Weight	96 Ounces
Liquid Volume	32 Fluid Ounces
Manufacturer	Hawthorne Hydroponics, LLC
Mixing Ratio	1:1:1
Model Number	HGCVB00062
Specific Uses For Product	Plant Growth
Target Species	plants
UPC	793094000345
Unit Count	96.0 Milliliters

General Hydroponics Flora Series: FloraMicro, FloraBloom, FloraGro - 3-Part Hydroponic Nutrient System, 1 qt. Bottles

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