I encountered a problem with the glossostigma a few days ago.
I apparently didn't plant the glosso very well in the first place, which led to its runners not staying on the surface or under the surface of the substrate. This means that every time I trim I basically kill everything.
Solution: Pull out the glosso and replant it.
Here is a pic 2 days later:
After the middle area stabilizes, I will move on to replant the back and some other parts too.
Some other good benefits: I was able to suction out LOADS of crap from under the glosso from my last trim. Plus I really crippled the snail population; those snails....