As long as it doesn't smell...off. There can be an odor but as long as it doesn't smell like a swamp or like something is rotten. Mine just smell like the nutes.
You will know the smell of root rot when you smell it. Roots do give off a faint odor. But it is not overpowering. Also pay attention to the color of your roots. They should be white with only a slight discoloration depending on nutes you use. I tried to post a pic of my roots but for someone they will not load tonight. Good luck and happy growing.
As long as it doesn't smell...off. There can be an odor but as long as it doesn't smell like a swamp or like something is rotten. Mine just smell like the nutes.