Oh. I just tested out of curiosity, & noticed it was same as what went in. So I thought that must mean that the soil is same too right?
Moon of your feeding til run off and able to test it no need to test exit run off only in
I'm pretty sure if your not watering feeding to run off salts have a chance of building up if not mistaken so it would be good to go feed feed flush .. but if your going to run off there is nothing sitting on medium it's been pushed out any salts that get built up? This is my thinking behind run off.