I would think that if you are getting 0ppm on your nitrates you aren't fully cycled. When you cycle a tank you have to keep that bacteria from your established tank fed with a source of ammonia or it will die. Here's how you test it: get some pure ammonia from the hardware store add a very small amount to your tank till you get a 3-4ppm reading on your ammonia test, if your tank is cycled the bacteria should turn that ammonia into nitrates in about 24 hours. If that happens your good to go. I would like to add make sure you are doing the nitrate test properly, shake the heck out of bottle #2 tap it on a hard surface in between the shaking.
Last edited by greaser84; 05-29-2014 at 03:13 AM.