1000ppm isn’t too high - it really depends on the plants. Autoflowering plants need less, for example. I use a nute that recommends 1000+ ppms in the late veg and through flowering. However, I had some nute issues and ppm buildup at those levels. Right now I go 1/4 to a half in my coco grow. Trial and error. I watch the runoff ppms for build up now and lower or raise the dosage based on that.
I don’t know the autopot system. I found this, may help you. It seems that it can be set up soil-like or hydroponic-like.