So are you saying that 900ppm is too much? and being that he has not used compost that statement is irrelevent to the situation. He doesnt need to know what he SHOULD HAVE done, he needs to know what HE SHOULD DO. And I was not recommending him to use 900ppm but using a just a bloom nute when there is a Nitrogen dif. is not enough. You need an additive and you NEED TO FLUSH. By flushing you wipe your roots clean and prevent shock. Like I said some strains can easily handle 900ppm and my plants are only 21 days old. Ill post a few pics and you will be able to tell that my plants are in no way hurting. So by flushing and then adding N to your dosage even up it to 600ppm you will be doing your plant justice. Im sorry but 300ppm is just not enough in bloom regardless of how old your plants are and if your someone that grows with compost how much experience do you have with using, monitoring, and adjusting ppm? Im not getting on you but your comment seemed directed towards me for recommending to up your ppm. So I am justifying my credibility. I will be posting a pic of my plants in a few minutes and this is a SOG at 21 days old taking 900ppm. You tell me if there bad?