well I got seahorses, and they are quaranteening in there now. They are small and were quite skinny at the petshop, and I have been wanting them for over a year but knew they didnt ship well and had never seen them anywhere around here! And they had some!! So now they are in the 5 gallon, being fed 4-5 times a day (I am monitoring parameters carefully and using water from the 20 gallon when I vacuum the bottom) and I am taking out the things in the 20 that will pose a threat to them (i.e. I need to catch the purple lobster!) So there you have it!