I’m less convinced that growers have no shared responsibility or that it’s a submerse response
I’ve observed overwhelming Anubias melt in plant shipments over some months, I’d never seen anything like it
While it began with a few leaves falling off, the rhizome also “melted”
(this is less apparent, until one gently squeezes the rhizome and finds that it mushes
)
And it seemed to spread, Anubias leftover from previous shipments (that had been in apparent good health for 2-4 weeks), over the next few days, began to melt as well
Nothing in the shop display tank or shop handling of the Anubias had changed ....
Searching online, I found reports of previous Anubias species melts going back some years - suspicion was some sort of virus, especially as when a newly introduced Anubias melted, and then every established Anubias in the tank subsequently melted as well - and not just leaves falling off, but complete rhizome deterioration
After some time, Anubias were added back to the usual plant supplier order, I’d check each plant carefully - some of these plants were shipping in with slightly droopy leaf/stem or with “soft spots” on the rhizome, they were placed separately and progressed to complete “melt”
In the last year, I’ve only received one order of Anubias barteri var barteri that was affected - after noting one plant with brown stems, I discovered 3 affected plants ... with a bit of handling, all stems showed loose attachment at the rhizome, I removed these from their pots to find soft rhizomes
@SDIESEL77 I suggest thoroughly vacuuming every bit of Anubias debris (including rinsing the filter), large frequent water changes over the weeks, inspect every Anubias plant you have - completely removing any that are the slightest suspect, trim away any affected rhizome + 1cm (if possible) of apparently healthy rhizome, before returning to tank