Bonsai grow

So as you can see this plant has had little growth over the last week. Grow a bit but not much, but also seeing what looks like light burn but it doesn't make much sense. At the height my plants at its only delivering 750 par on the plants. Only other thing it could be is my nutrients but my run off has only been 50-100ppm above the feed. Only thing I can think of is stress from being in the front room and running from 7am ton7pm. Other then that I can't think of a reason for what I'm seeing. Oh well this plant is just for fun so of I end up throwing it out or having it herm on me it won't be a big lose Well that's all, happy growing everyone!!!