The answer, in this case, depends on the crops you are planning to grow in the system. The most popular elements found in these nutrients include Nitrogen, Phosphorus, Potassium, Calcium, Sulphur, Magnesium, and Iron. On the other hand, these are just a few of the essential ones.
If you want to obtain the right results, you should, first of all, make sure that you accurately know what the plants you are going to grow need in terms of nutrients. Then, once you have this information, you can look for specific products that are already formulated in the right and balanced mix of nutrients for your crops to thrive.
Of course, you also need to make sure that you use them correctly and according to what the manufacturer recommends, but once you get the hang of everything it’s not a very complicated process.