well im not saying to forget them but treat your tank as they are not there and let nature do as it will with your fish . they have been known to stay under for a month and even more and then just appear as if they were hibernating and in perfect condition so dont worry . one thing that you may find is that their "time clock" is off and they may come out at night and forge for food then sleep during the day . many times you will never see them coming out at night as they will hide as you enter the room so dont be concerned because there is nothing that you can do at this point just wait them out and cross your fingers .another note ,90% of mine that have died come out to do so for some reason so you will usually find them if they succumb to the stresses from their collection ,warehousing and shipping process .