I just had a success story I thought I'd share. I read all these ideas, but none worked. My tomato clown is a runner, and a world class one, at that. It darts into its host if I even enter the room. As soon as anything foreign entered the water, it was out of sight, hiding in places I didn't even know it fit into.
Luckily, he hosts in a xenia, which is easily moved... even INTO a specimen box. It took him about 4 hours to get used to the idea, especially after I had stressed him with the whole net episode, but it worked. With the host inside the specimen box, which was on the sand bed, he eventually made his way into the box, as well.
