I found this in my terribilis viv. It looks like a white tree and is coming out of one of the plants. It is growing at an alarming rate; when i found it this morning it was a few inches long and an inch or so across, now it is approaching a foot long and four or five inches across. I'm not sure if its a threat, it's just annoying and a bit worrying. Please help ID it in case it is a threat to the frogs and help me get rid of it.