Ever see this

[ecobalance]

My mushrooms are spewing what looks like lime green silly string out the middle.

 

[drummereef]

They are just expelling their guts. Probably from stress.

 

[spongebob lover]

yeap i agree with drumm reef dood .

 

[Anthony Calfo]

correct... messentrials that are only expressed under stress. Some aspect of water quality (noxious neighbors, lack of adequate water changes over time, temperature spike, etc)