Phal and dendros root fungus and root rot
 

Ok so I have a lot of root problems. And I'm just going to list them

-2 phals I cleaned of from dead roots a few days ago and potted loosely. Today I found out they smelt very very bad and I take them off rom the media and behold the roots smells bad. A lot of the roots were dead.

-one phal got white fungus on it roots and I've been airing it out but the plant is now shirevelling because of dehydration.

-a dendro also has fungus problems and I notice it today

All of them were brought without tags. So I have no ID on all of them

All potted in a mix of charcoal, sphagnum, cocnut husk, and fern fibre (we don't have quality bark here. The mixture is what other people use here)

What should I do? What should I do in the future to prevent this?

Firstly, pics or it didn't happen. We might notice something you're not used to seeing.

Also, neem oil x1000. Neem oil spray is my go to fix for all things pest/fungus/oops.

It sounds like they were kept too wet. Don’t spray anything on the roots. The fungus is likely not pathenogenic: it’s just breaking down dead tissue.

For the Phals, I’d put them in fresh loosely packed sphagnum in a well ventilated pot. Keep the sphagnum damp (not wet) and wait. It can take a month or more for them to start regrowing roots.

Dendrobium are so variable that I think species background is necessary in order to give advice.