Dry or Liquid Hydro Nutes?

What are the pro's and con's of using Liquid hydroponic nutes vs Dry hydroponic nutes?

Any help will be much appreciated, thanks.

The powders have a longer shelf life.
They don't always mix as well as liquid does.
I think powder nutes give you more for your money too.

dry liquids when in use over a week builds up salt chemicals alot faster than liquid nutrients

Dry nutes do have a longer shelf life; you can save money buying in bulk. Dry might(?) not be best for an aeroponic system, but it's never given me problems with anything else. For the most accurate dosing you'd have to weigh dry nutes. Liquids can be added a drop at a time though.