I took a water sample of all 4 of my tanks. I went to 2 pet stores, one is fish only(you'd think they have a clue). well bottom line They gave me 2 different readings. I have a ammonia test kit, but it is to had to read, the colors r close together, and reads different in every room of the house. Do they make a test kit that is clear if no ammonia is present, and chages to yellow if there r? Test strips r the same way, I get colors that is not even on the chart. I have wasted alot of money trying new things....I need a test that is colorless until something is present.