PPM Levels

I am running a hydro set up. You have all probably heard this question a million times but what is the perfect ppm rating? I am on a dwc set up.
Sweet as

Depends on what nutrients you use. Personally I recommend the Fox Farms line. Their website also has a perfect feeding schedule posted. Many people have reported excellent results with this.

lollipopka

I haven't had alot of luck Fox Farms products. I use Botanicare Pure blend Pro grow and Pro bloom.