Berghia questions, answered from our tanks

These are the questions we had (or panicked about) when we started using berghia for our own aiptasia. Every answer comes from what actually happened in our tanks, and we'll keep adding to this list as we learn more.

• How many berghia do I need? (Berghia calculator)

  Enter your tank size and how many aiptasia you can see, and get a starting number.

• How to get rid of aiptasia (what we tried, what we skipped, and what worked)

  Scraping and cutting made more of it, we never used the Aiptasia-X we bought, and four berghia cleared our 16 gallon in about a week.

• Does cutting aiptasia kill it?

  No. We clip aiptasia on purpose to multiply it for our berghia, and here's what happens.

• Why does my aiptasia keep coming back?

  Tiny pieces regrow, more are hiding than you can see, and new ones ride in on rock and coral.

• Does light make aiptasia grow faster? (And will turning off my lights kill it?)

  Light helps aiptasia, but turning your lights down won't get rid of them. Here's why.

• Do berghia actually get rid of aiptasia?

  What happened in our 16 gallon, plus video of one berghia eating an aiptasia four times its size.

• How long do berghia take to get rid of aiptasia?

  About a week in our 16 gallon. Here's what makes it faster or slower.

• Will my fish or cleanup crew eat my berghia?

  Who lived with our berghia, the egg spiral we lost, and which tankmates reefers warn about.

• I added berghia and now I can't find them. Are they dead?

  We saw ours the first night and never again. The aiptasia were gone in about a week.