Mold spot on roots

One drop of bleach per gallon per day.
My guess in your reservoir is to warm 65 to 68 degrees F buy or make a chiller drop in chunks of ice.

You need all the rotting parts off the roots removed ......Clean the plant change the water put in bleach , get the water to the correct temp.

 

Not black palm ,, I have some just never tried turning it. And thanks.
I bought out a custom cue makers wood inventory. and some black palm was in with the other woods.
Highly figured rare woods getting harder to find and costing allot more.
You might consider posting some of your work, I would like to see it .

 

The flower should be fine.
An alternative to bleach that is getting more attention lately is hypochlorous acid, like Athena Cleanse. When you add bleach, you are raising ORP (oxidation reduction potential) to help fight off bad stuff. Hypochlorous raises ORP also, but without the dangers that come with bleach. In fact, you have been using hypochlorous your whole life! Our white blood cells make it. Its also one of the very few substances approved for would care. Very interesting stuff!