I am currently cycling my new 5 gallon tank. I have been testing the ammonia and nitrite, however the test kit I bought did not come with a nitrate test. I was wondering if I really need to buy one. It seems like I should be able to monitor ammonia and nitrite and consider the cycle done once those have both gone down (once added ammonia is gone within 24 hours), but there may be something I'm not thinking of. Anyone have any ideas about this?