My reef tank was loaded with aptasia. My Berghia arrived safely. I didn’t see them for a while so I figured they didn’t like my water and died. I took pictures of aptasia and none were missing. A few weeks later I saw an adult out during the day which meant they survived, and they were eating which meant aptasia was disappearing. Since then, I’ve seen 2 more. They seemed to leave the big aptasia alone (about an inch in size). I used a product for aptasia control. Working together, my tank is aptasia free. It’s been a good month and nothing new has popped up. I highly recommend these nudibranch. I have a 12 gallon and got 4. If you have expensive corals, they’re worth the money! They do their job!
Date Added: 12-06-2017