one morning when i turned on the lights to my tank my mushoom never opened up. usually when i turn on the light it will open up big quickly. the other one opened up. i think the fish might be nibbling at it also. it has stayed small for a couple of day's and i'm not sure if it's dead and i should take it out cause i don't want it polluting my tank
Check make sure their not getting heavy flow. Most shrooms & ricordias do not like heavy flow and check your water thats all you can really do for now.