@ Shalika, there is a nutrient solution called wormi-compost or wormi-liquid which could replace Albert's solution and it is totally organic and can very well be used to protected house cultivation.
There are many commercially available organic fertilizers ( potassium schoenite for example , we observed good in citrus under CUPS) , can be effectively used in protected cultivated , quite compatible with fertigation , apart from what Dr Tarafdar has elaborated.