To cycle with shrimp all you do is put a dead shrimp in the tank and monitor the ammonia, nitrate, ph, and nitrate. With a 30 gal. tank you can put in 1-2 deadshrimp(ones you get from the grocery store). Your ammonia should go up real high and then drop to 0 and then your nitrite will go up and drop to 0. A couple days after the nitrite hit 0 I took out my shrimp. This process took me in my 55 gal tank about 3 weeks. I then waited a week to add fish and they had no ill effects at all. I will try to find the website that list it out better!