oh, and if you are not, be sure to use water conditioner (removes chlorine and metals from water) it is a must have, not an option as some people have wrongly stated
Consider getting some Nutrafin Cycle? This product kickstarts the cycle because it is in essence a great dose of pure bacteria needed to break down ammonia and nitrates. Since your tank cant cycle though, this can still help bring those levels down. Also great looking tank for Zombie!