Found out how to permanantly kill giant Aptasia!
I recently found a huge (4"!) aptasia anemone in my saltwater tank, on a smallish rock, and I wanted it dead. Here's what I did:
I removed the rock, very slowly so as not to alarm the anemone and cause it to release babies.
I then placed it in a container with a bit of tank water, aptasia side up, with the anemone out of water.
I got a toothpick and poked the aptasia until it scrunched itself up into a little ball. Since it was out of water, if it released baby aptasia, they wouldn't go anywhere.
Then I got a tube of Super-Glue and absolutely covered the pest in it. I made sure it was completely covered, then used the toothpick to poke holes in the anemone, and filled the holes with glue as well.
I gave the glue a few hours to set, then covered it with a scrap of plastic bag just in case there was a bit still wet. I didn't want my snails getting glue on them.
It's been two weeks since I did this, and that aptasia is still just a small, white, dead patch on the rock, with no life whatsoever. What's more, there aren't any more anemonies. Score one for the Super-Glue!
My adventures in keeping Indostomus crocodilus, the crocodile toothpick fish. AKA armored stickleback, paradox fish, and freshwater pipefish. Care is (to the best of my knowledge) exactly the same as Indostomus paradoxus.