I am doing my first grow, and I am using 70% mother earth organic soil 20% worm castings and 10% aeration(pumice). I think that I know the problem which is a nitrogen toxicity and I think this happened because I cooked my soil much to far in advance(maybe not). Anyway I looked it up on youtube and only saw methods that are used for non organic means. Do I flush my soil? What should I do after to make up for nutrients lost in the flushing while staying organic? Any help is greatly appreciated! Also I used earth dust dry amendments

Why do you think you have a toxicity? If you are running organic then there is no need to flush. Also, you can't really "cook" your soil too long. The minerals you add when amending stay there and dont just go away, you know what I mean ?