Stuck in China with no hydroponic nutrient

[Mathmattx]

chemistry is eAsy enough...your problem is not going to be the chemistry, but the reliAble evaluation of what you have. Unfortunatly, again you can't accuratly gauge concentrations, measure salts or solubility without some basic equipment, that I am supposing you can't get in china, otherwise you could get hydro ferts. As you already know, biggest concern should be chemical contaminNts like etheltheyne glycol, melamine, other?