I trust my cannazym and rhizotonic to keep root rot at bay. Costly solution but that's just us.

Green,.....I called my hydro guy and he suggested that if trying to keep ph and nutes balanced in a 25 w/f setup hooked together to a central rez he'd up to the pump shown below. It's pretty strong so he also suggested placing a stop valve inside the main res in order to control the speed of flow/air power you would need.