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How can I cheaply fertilize my Aerogarden?
I have an Aerogarden (a little self-contained hydroponic system) that I got as a present, currently growing basil. I have run out of the little nutrient pellets that came with the pods I was given, and can't really afford specialized hydroponic nutrients. If I get a generic fertilizer intended for soil-based plants, what would I need to supplement it with to make my basil tolerably happy?
If it makes a difference, I fill it with RO water, to avoid excess calcium buildup, but I live somewhere with very hard water, so if all that's really needed is, like, calcium, I can just add some tap water to the system occasionally.
The problem is, a standard fertilizer for soil plants is "assuming" that the plants will get certain nutrients *from* said soil. They don't usually include various micronutrients that are relatively abundant in soil, like calcium.
