Nasty, but it's not recent damage. I'm not even gonna hazard a guess at what the original trauma was.

If ya look for em, you can see some healthy root growth moving into the damage zone, and no much that's dieing- plenty that's dead. I'm thinking that they'll heal better/quicker if you can get the rotting stuff and slime out

Ya sure do got some bio-slime going there, tho. Yer gonna want to put a screen over your return, disconnect it from the res, put a jumper over to your waste drain/bucket. Now block the return so the table can't drain, flood it, and massage those roots by hand to comb out the really loose, rotting crap, and knock off a little bit of the slime. Dump the now nasty table full of nute, fill the res w/ plain ph'd water, and rinse everything. If yer water isn't municipally chlorinated, ya might wanna add maybe a drop of bleach per 5 gallons. Easy, though...

Dump and clean out the res before ya call it done- really not likely to be much of a problem area, but it's really easy to service.

Ya might wanna think about a bacterial innoculant, if only to compete w/ whatever the hell that is.



Does this table stay wet / get anaerobic? Shit can't sit in still water- goes sour.