I received some glosso that fit this same description. I ended up cutting the brown parts away and cutting like he ^^ said but into 1-2 in pieces buried .5-1 in deep into the substrate. Right now the tank is in emersed mode but I'm starting to see obvious growth and no melting at 5 days.
Good luck! If I could wean that pathetic glob of glosso back to life I'm sure you can as well! :bounce: