Peppermints are hit or miss indeed. Nudi Berghia will die off once they have removed the aptasia as nothing else for them to eat.
Get an Aptasia Wand and zap them as it works like a charm.
If you want high-end acros, contact Leo (ReefHoboBum in Socal RC) - he has ton of them and get your checkbook ready as high-end stuff are not cheap!! He'll be at SCMAS this Friday in Santa Ana.
Selling ORA Red Planet colony approx. 4x4 fully encrusted on a large thick rock (6x6).
Price: $145
Or trade for a colony of ORA Pearlberry. Local pickup only and no-hold please.
For cost affective, most folks make their own two-parts such as Randy's Two Parts, etc. or buy the powder type two parts from BRS and mix it up yourself.