Thank you, Tamyu for taking the time to help me explore alternative filter systems to help cycle my small tanks. Even though we (I) hijacked the OP's thread, I learned a great deal and was encouraged to explore various filter arrangements.
You're right, the URLs you gave me were of less use to me than to you. Haha.... I infer that you are an American stationed or employed in Japan. If you are Japanese, your English and grasp of idiom is marvelous.
I'd like to get you on my friends list; makes it easier for me to keep track of you. If this message screen is too public, I fully understand. I welcome PMs. Thanks again and best wishes.