So, I tried a little experiment. A few weeks ago, I took out one of the mangroves and added it to a bucket with lots of topsoil. I then planted the mangrove in the topsoil and filled the bucket with saltwater from a water change. I then put the bucket near a large window where it gets lots of light. I then decided to stake the mangrove until the roots get re-established in the bucket.
Since I replanted it, the magrove has grown an inch or 2 and sprouted some new leaves.
