I am just setting up a rotifer culture for a pair of clowns that started spawning. Unfortunately something came up and I have to leave town the day after the rotifers arrive. I have a 4 gallon bin filled with salt water that is heated and has an air stone. What can I do to preserve the rotifers for the roughly 3 days that I am gone. I do have someone feeding my reef tank so I can add Phyto every day. I just can't clean it.