I'm getting 8 breeders (1+in) so I'm planning to do some culturing myself. Some to use on my tank, some to breed and sell.
From Inland Aquatics website.
HOLDING BERGHIA IN JARS
A little preparation will greatly increase your chances of successfully rearing some nudi hatchlings. Aiptasia reproduce most prolifically when left in the dark, especially in regard to the tiny anemones required for young post larvae.
A WEEK OR TWO BEFORE YOU INTEND TO RECEIVE YOUR ORDER, Collect a dozen or more large Aiptasia and place them in two Mason jars with water from your system. Be careful not to add much anemone slime as this may cause water quality problems. Plastic pipettes are great for collecting Aiptasia!
Mark the water line on the side of each jar with a Sharpie.
Cover the jars with a very loose lid.
Place the jars in a cabinet or some other very dark place with a relatively stable temperature.
Top the cultures off with fresh water each week to keep the level at the fill line.
Upon arrival, place the new Berghia in one of the jars. The other is to be used as a reservoir for feeder Aiptasia