This past weekend my brother came up and got to see my new hobby. He watched my fish for quite a while and seemed really interested in the tank. He mentioned that he wanted one of his own but is going to be out of the country for over a month and will wait till he gets back. I mentioned that I could use my tank to seed his and speed his cycle. I have read that some substrate will work foir this and heard mention of using a sponge. What's the best way to give him a good starter culter?
(also my tank is fully cycled!!!!

WOOHOO!!!, 6 weeks people. Dont fish cycle, its been a royal pain. But I am still excited!)