GSP how long can they be dry?

[Randall_James]

I need to move a tank with a nice mat of greenstar polyps that cover the overflow. Down time will be about 4 hours, has anyone every seen how long this can go without water?

I would rather not peel them off the overflow is all and then have to try and reattach them

[jiggy]

they will be fine just as long as they r always kept moist.. dry = bad