Don't forget a tablespoon of Physan 20 in a gallon of water to rinse in. It will kill any bacteria or fungi or virus from soil so not to contaminate the hydro. You can wash all tool and your hands to clean them off.

The big thing is cyanobacteria posing as root rot and it can easily transfer from soil to hydro.

Or run bene's but from what I'm seeing bene's are very expensive to keep in hydro with all the water changes.