well I overfed boom and veg dry amendments waited 2 weeks instead of 4, by accident. I now have a K potassium toxicity which will always express as a magnesium deficiency. The salts side would flush the pot at this point, However, I am organic and instead I am going to give the plant the magnesium it is looking for allowing it to process the K faster. This should resolve the issue without flushing. If you have to flush an organic soil then its pretty much just wasted mix it into fresh mix at least 50/50 and start again. Basically flushing is not an option in organics.