So that reading is about 1.2 ec...take away your background ec (tap water) your feeding about 0.8 ec,that’s ok for her,she looks nice and healthy and green,but you could up it to 1.0 ec,which is about 980 ppm.she should be able to handle that fine,she looks about the same size as my Skylar White,and she’s on an ec of 1.0.my tap water is shite here...0.6...very hard water! I’d up her feed to 980 ppm,and see how she takes it,if she looks a bit dodgy after feeding her that strength,knock it back down to what you were feeding her,but I reckon she will love it,and you’ll see better growth.just need your ph pen to turn up now dude,and aim for 5.8-6.0 ph,and you’ll be laughing dude