WHile you're at it, let me copy the article I have about mushroom anemones.(I can't paste the damm thing so got to do it the long way). It goes...
Mushroom Anemones
Discosoma sp.
Belonging to the same family as anemones, mushrooms are ofter referred to as "false corals." Externally, they look similar to anemones but internally, "corallimorphs" more closely resemble skeleton-forming corals. They are also known as Disc Anemones.
Mushroom coclonies are very popular in reef aquariums because of their many colors, the different types available and their ease of maintenance. They reproduce quite freely under average conditions. However, they are susceptible to high levels of nitrates and phosphates....naturally, using phosphate-free water for changes, minimal feeding and good protein skimmer should be your first line of defense against these compunds.
The natural habitat of each species should be kept in mind when positioning a specimen in the aquarium. Some species require intense lighting and some cannot tolerate it. If you are unsure, it is wise to locate the new specimen at the bottom of the tank and gauge its reaction after a few days. If it appears to be "reaching" for more light move it up a little closer to the light. Make small moves (6") and if it shows signs of distress or burning, move it away from the light. (Then it went on to discuss the three modes of reproduction). Hope this help.