still waiting for #'s for parameters saying good don't help us help you
Nitrite
Nitrate
Ammonia
PH
Alk
Phosphate
Salinity
if some of these parameters are off it can be the issue
how old is your tank
do you run a skimmer
tank size
What type of light you have make model
was it acclimated to light when you introduced it to the tank
where is your toadstool located in your tank top, middle , bottom
how much flow is it getting high , med , low
are you using tap water or ro/di
we ask these questions to learn about your tank as we are not there
knowing this info helps us to try to help you to pinpoint the issue