I know what I’m in for lol, I’ve had one for about a year now that split into 2 about a month ago now and originally they used to never move but now that there’s two of them, they seem to fight with each other and move a little bit you know a couple inches around this one rock but I will say this is the first of one of mine, letting go and getting sucked into the filter, if either of them split again, I’m gonna bring at least one of them to my local fish store that I never have more than two because it’s only a 20 gallon with a bunch of Coral in it tooYou are in for quiet a ride. There's no lesson to be learned here. I have 3 in my tank, one stays put, one walks sometimes, one walks non-stop. The middle one that walks sometimes, will stay put for weeks. and then move.