Join Date: Oct 2010
Location: Victoria, Australia
I think you basically just want a few leaves left on whatever rhizome you are removing.
I always cut straight with a sharp pair of scissors so that the cut is clean and you aren't crushing the rhizome rather than cutting. Just keep a look out for any softening of the rhizome, discolouring or foul smell as this can indicate the rhizome is starting to rot. If that happens I just snip the damaged section off as well.
Your anubias looks very healthy though. It is one of my favourite aquarium plants. I have only a couple plants now and am wanting to find a particularly large barteri to go in one of my tanks.