I've been breeding Berghai now for over a year. I found the hardest part was having enought Aiptasia to feed them.
Ill describe what worked best for me.
The Berghai Cultures:
I used small tubs (around 500ml) and kept them in my main tank, attached to my overflow. In this I placed my first pair of Berghai Nudibranch. I fed them an Aiptasia each day. The bergahi would lay a spiral of eggs each day or every other day. Once I had a few spirals of eggs I transfered the adult berghai into another container and left the eggs in place. After researching I discovered the eggs would hatch in 9 - 14 days. I added the smallest aiptasia I had into this container after around day 8 so any early hatchlings would have food (if you have no baby aiptasia cut up a larger one - but keep an eye on it as it can foul the water pretty quickly if its not eaten). If after 14 days there were still eggs in a spiral I would use a pipette to remove them. There would be no water changes during the first 4 weeks after hatching. just RO top up to keep salinity right. After around 3-4 weeks after hatching you should be able to see baby nudi. From then on its simply just feed them and start doing small water changes each day. Keep an eye on salinity. After about 7-8 weeks after hatching your nudi should then be around 1/4" in size. Best bit of advise is to keep an eye on the salinity of the water as it can rise pretty fast.
The Aiptasia Breeding Tank:
I use an old nano tank, around 50 litres. The equipment is a heater and a powerhead, that it, not even a light. I put an add on a local reef keeping site for some badly infested live rock and went and picked it up real cheap. I put this into the tank using water from a water change to fill the nano. I would then irritate the aiptasia every other day to get them to release spores which then grow into baby aiptasia. I would feed the tank with D+D reef paste every other day or whenever I remembered. After a few days you will see tiny aiptasia stuck to the side of the glass etc, and its just a matter of scraping them off and feeding them to the nudibranch. again, best tip is to keep an eye on salinity.
I cant think of anything else you may need to know, its pretty easy to get the cultures going. Feel free to ask any questions and Ill try and help you out as best I can
-Tony
