This is not true. You can do neither. I did hydro for years with just adding my nutrients. Never had any issues. This sterile vs myco thing is just the latest forum fad. Wait 10 years and everything will change.
Adding in red spectrum light...
JD
Technically that is still just running it sterile. You don't need to add anything to run sterile, you just need to keep your reservoir temps at a level where you don't get pathogens. Since not everybody has an environment where they can keep temps in the goldilocks zone, understanding ways to keep your roots healthy is very important. How is that a fad?
Besides, the intention was to keep people who are using beneficials from creating a anaerobic mess in their res by killing them all with bleach.
