I have two toadstools, one really really large one and one smaller one and my clowns arent' interested in them. BUT clowns can host almost anything. Some even go for powerheads or rocks. it's pretty much a crap shoot.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.