I am newbie to hydroponics. Am currently running tomato plants. I am preparing nutrient solution based on formula computed using hydrobuddy tool.

I don't have access to chelated Iron locally. But I have seen commercial micronutrient products marketed for both foliar and soil application. I am not sure if I can just mix these commercial products along with my nutrition mix(I guess I would be facing unknown ppm of micronuts in mixing directly). Does weekly foliar ONLY application of ALL micronutrients works with hydroponics?