Well Established Anubias All Leaves Fell Off Within Week

Been in the tank for a few months now.

Attached to driftwood(entire rhizome above substrate)

Using diy co2 and seachem flourish with every weekly water change.
Also use flourish tabs.

All the other plants are doing well (amazon sword, anacharis, java fern, java moss)

The rhizome looks great, is firm, and has TONS of roots.

No changes were made to my routine/water/anything while this happened.

For the first 3 months the plant grew fast, put out a couple new leaves, put out an immense amount of roots.
Suddenly, within the course of a week, a few leaves started turning yellow at the tips then over the course of about 3 days the leaves stems completely dissolved(even healthy green leaves) and the leaves floated to the top.

Why would only the stems dissolve?

The rhizome looks great, lots of roots but no leaves at all now... It will be a nightmare to remove it, its VERY well etablished.

What do I do?

 

Have you checked pH? I wonder if it's a disease or something since it's just the one plant. Also, I read an article that flourish doesn't have very high levels of nutrients. But if it's been working, stick with it. Hope somebody else can help more.

 

PH is always around 7.8 which is kinda high.
Also the plant is getting a lot more light than it should.

I probably should be dosing more flourish. It seems like the recommended amount on the bottles instructions is very small.

I want to remove it and put it in a different tank with much lower lighting but it is so well attached to this driftwood I don't think it will ever come off.

Can it sprout new leaves even with no leaves on it? It hasnt tried too since this happened.

 

This was the plant about 45 days ago.




Only changes since then are the addition of java moss and removal of the Crypto

 

First off your PH is fine. If your rhizome is intact it will grow new leaves. To move it, just cut enough roots to free it from the wood. You will need to reduce the lighting as you pointed out. I would suggest dosing Flourish only twice a week.