Help! Did I kill my Toadstool?

[jennytheleopardgrouper]

My huge toadstool was growing algae on the side that faced the light. Like I'd done once before, a few days ago I gently scrubbed off the algae with a brush. Stupid? (I don't know..) This time however, I accidently poked a small hole with the brush and a bit of liquid came spurting out. Well, I thought everything was fine, but I got home from work today and it's curled up into a ball, and on closer inspection, the bottom has all but disintegrated, and there's a 2 inch chunk missing like someone took a huge bite! The "poke site" seems unaffected, but the one tendril on the bottom that has been there for years has disintegrated into a pile of "dust" and is laying on the bottom of the tank. Is there anything I can do to help it? Thanks in advance for any help!