Your Perc will not do it to the severity of a Tom Clown, but it will happen. My CB Tom didn't do this until about 2-3 months ago. Suddenly, he started fanning and 'digging' all over the back half of the reef. He hides in that 'hole' during the day when he gets spooked and hosts a pile of snail shells at night.. I don't understand it..... I do know you best get used to the sandstorms as I've heard it remains at a constant level of fanning through a clown's life.
I personally like the constant turnover of the SSB.
BirkhoferFan15B - BTW, are you a machinist for a auto supplier/manufacturing facility? Just wondered as I might have deal with your company before.
HTH,
DW302