My tropical terrarium is six weeks old. Humidity 65-80%, temp 77-82 degrees, 40 watts lighting, lid partially open. All are growing nicely now but I noticed two uninvited objects growing about 1/8-1/4" daily. My substrate is composed of coir/tree fern bark and a little live/dead sphagum moss and is nicely moist. The picture shows the "bowling pin" object about 1 1/4" tall. Is this a mushroom? Should I leave it in the terrarium? They don't appear to be spreading.
Here is the pic below(excuse my first terrarium pic) :
Here is the pic below(excuse my first terrarium pic) :
