To kill a lacking plant

Hey guys, I want to kill 1 of my plant in my reservoir because it is weak and won't grow. If I remove the plant and leave the roots in the reservoir because they are tangled, would the dead tangled root become a problem to the other plants?

First time dwc
Here is my journal if you want a better picture

https://www.rollitup.org/t/600-hid-res-dwc-4x4-nirvana-blue-mystic-first-real-grow.947719/

You can do it if your careful removing the tangled roots. Run some Grozyme or some root beneficials like Subculture B.

This way the dead decaying or rotting roots get eaten by the microbes. Also you'll get rapid fresh rooting at the same time.

You can continue to do this throughout the grow or run a sterile res with SM90. It's great at killing and preventing pathogenic root-zone bacteria and doubles as a wetting agent.

Keep the water temputure cool to slow bacteria down or rot. 68F <