Hi guys, nice to meet you both today. Please let us know your names again as we were like two kids in a candy store........what an exciting hobbie. We did what you said and put a shrimp in the tank. Some bug looking things showed up instantly. We turned the circulating pumps off for a little while and noticed that we have a couple of very tiny feather dusters in the LR. Thanks for all the advice. Please keep in contact.