Opposite of what "mobert" said (( and not to disagree, just to show how different clowns are )).....
When I moved, 3 years ago, my Clarkii pair kept their same 2 week schedule, spawned about 4 days after the move. Putting in a tile, or removing it has never bothered them. Heck, if I happen to feed the tank in the middle of their spawning, they will stop, eat, and start again.