What is the number 1 nutrient

[scorpionidae]

What is the best hydroponic nutrient, that gives the fastest growing plant and has the lowest risk of any root burns and the lowest risk of toxic build up.

[Sparrow]

Its more how you use them. Combine the numbers you want of what you want and use that.

[turtle420]

What is the best hydroponic nutrient, that gives the fastest growing plant and has the lowest risk of any root burns and the lowest risk of toxic build up.
Tap water.