That does seem quite high, but it also depends on what conversion your ppm meter uses. 500 or 700. 1000ppm in 500 scale is 1400ppm in 700 scale. I usually shoot for 1000ppm max on the 500 scale. so if your meter uses a 700 scale you aren't all that high. Also, I don't really see any signs of overfeeding from your pics. If growth is good and plants look happy then you are probably okay.