Hi, after going through your diary I might have your fix, or at least give them a little boost. Focus on N, nitrogen is key in these first 4 weeks of growth. And you are under feeding them. Which such a low dose you are only giving enough just to stay a nice color. But with N that energy them leafs are bringing in, well it's like a gas peddle without the gas. You need to give her the tools so she can focus that energy on growth. What is your PPM. Increase her N, whatever has the most increase. It should be 2ml/L and then you decide how much of that L she can take in a week. .33 is not enough even if you have her 300ml with .33 in it that would be better. Your mix is not potent enough for an inert sub. Increase her feed to 2ml/L and then decide how much you want to give of that mix. Best of luck. DM me if you need any more info on what I just said. Happy growing.