Pretty sure ive got nitrogen toxicity

I'm in dwc and I dumped nutes 2 days ago refreshing the water a second time without nutes today.

Is there any type of flushing products or procedures I can buy or follow?

CAnt flush in DWC
Lower the nutes and she will rebound

Neat chart thank you I'm savin that one

for sure nitrogen toxicity though. It actually looks like its been fixed?

edit: re-read, good move, you’re on the mend. New growth looks ok.