I just started my 55 gal fresh - brackish tank. I didn't know about the nitrogen cycle before I started it. So I gave the water 24 hours to cycle and boom I put in fish. I did lose a couple at first that were probably stressed. One had ick a week ago but with high temps and salt (turning brackish anyways) it has cleaned up. My dilemma is my test strips (I know I need the master test kit) are showing nitrate 20 nitrite 5 after a 40% pwc before it was 10ish. Gh 300 kh 250 pH 8.4. I cannot test for ammonia yet but did buy a tetra product to minimize ammonia and nitrite which is gone now. My aquarium has been running for a month and I haven't had losses in 2 weeks the last one with ick. They look happy so i don't know if I should worry?