worth a look it is a beauty and owner posted tips on anthias.:
and from this site:http://www.netpets.com/fish/referenc.../anthias2.html
These fish are best kept in a small harem of one supermale and five females. They should be placed in an aquarium no smaller than 100 gallons. Lonely specimens will generally not do well.
Since Acropora is their favorite coral they will do real well in tanks where this coral is present but this is not a requirement. More important is the size of the tank and the feeding of plankton.
Should you place all females in a tank you may very well observe the sex change mentioned earlier. This may take several months before it actually happens though. The fishes first need to get accustomed to their environment, fortify themselves and be generally free of stress. Do not keep Anthias with aggressive fishes. This will continuously stress them and may cause them to jump out of the tank.
Daily if not twice daily feeding is a must. Frozen plankton can be used. In aquariums with plenty of live rock they will derive some food from the animalcules that inhabit such rock. This is not sufficient though, and supplemental feeding is a must.
Caves of some sort in the aquarium are a plus but having branched coral is better. Lighting should be moderate to high but need not be metal halide type, unless of course you also keep corals in the tank that need such lighting.
The Lyretail Anthais does best when kept in a species-specific tank of at least 125 gallons for a group. Males are best kept alone with several females, or singly. The Anthias dwells in the middle of a tank but appreciates the availability of several hiding places.
this is some of the research that i had done that lead me to believe that my 75 was not suitable..i guess i am not willing to risk killing them to find out.