You can give your organics a boost with water that you clean aquarium filter media in.
I have never taken ppm readings as it is impossible to burn plants or new seedlings with it.
Yesterday I cleaned a particularly dirty filter in a 15L bucket of water and took a reading.
My tap water is about 47ppm and with the filter dirt in there all stirred up and the water nice and black ppm came back at 58ppm. You see many things won't show on a ppm meter, especially organics not from salt sources. Things like urea for example. The filter washing is also full of the bacteria that further break down this food.
I am not doing pure organics so I still add my nutes and calmag as per usual.
Edit, this is not the same as the ppm of the aquarium water. That is at least 100ppm more, but can also be used.
Nitrites are broken down into nitrates that end up in the filter.