Throw a filter in the temporary house that you will be keeping the fish and shrimp. Also, use a desk lamp or something over the temporary holding area to keep the water from becoming too cold.
Keeping a layer of your old substrate is a good idea. However, if you want to do a 100% substrate change then you can stick some of the old gravel in pantyhose and keep that in the tank for a few days.
Last edited by 2Shi; 01-12-2013 at 10:28 PM.
Reason: misspelled word