Toadstools i found out are some of the more "delicate" leathers. if you move them, bump them, change salinity, or change anything for that matter in the system, they will tell you and will start "browning out". This is usually the sign of instant decay and will lead to its mortality, in most cases.
I had a toadstool and did the rookie mistake by moving it. It browned out. But with mine, it went full on self destruction mode. Its a good thing that it is changing back to its off white color. Man, when these leathers go, they go. Keep a careful eye on it. However, great news on the dosing. Glad to here you have had great success with it and most of the inhabitants are to inebriated to realize what is going on!!!! Are you dosing Goose, Chiroc, or a great Russian vodka?! :thumbsup: