You eiter quickly increased the bio load in your tank or for some reason, such as running your skimmer and doing water changes before you should have, your cycle never fully compleated and you should get that taken care of.
so what do i have 2 do. i dont have a RO/DI unit. shoud i go out and git one cause i just read it some were that it is the frist step in matince. if i left any thing out just say it ight. so i know