have had a tank set up now for a couple weeks with some guppies and ghost shrimp and had tested through the ammo spike and nitrites followed but have been testing for the last 4 days with between .25 ish and 0 ammo but still 5 ppm or better nitrites ph is 8 ish and a 6 -7 kh nitrates around 10 to 20 ppm just wondering if this was normal to have a high nitrite but almost no ammo