Help!!! This is my first tank set up . It will be just fish and rocks (not live). I have had the tank cycling from about a month now. I used a product called bacter boost which is suppose to cycle the tank in three days. After a couple of weeks I took a water sample to the pet shop and they tested the water and told me that everything was peaking and that was normal. But the other day (two weeks later ) i took another sample and was told the everything was fine except for my nirites . Which never dropped with my ammonia after the peak . PH perfect , ammonia perfect , nirites high . I was told to do a water 30% water change so I did . That was this past sunday . Tested the water tonight ph good , ammonia good , NIRITES NOT GOOD . Please help !!!!