Guess what, this morning I checked in my tank and my last bristlenose is gone, so there goes all of them
Ammonia is 0ppm, nitrite is 0ppm (I assume), I stopped testing for nitrite 4 days ago because before that everytime I test it for the past 3 weeks, everyday, it turns out to be 0ppm, nitrate is still about 30ppm after the water change.
I was wondering, when comparing the test tube against the colour chart, am I suppose to hold the tube right against the white part of the the colour card so it's in contact with it? Or does it not have to be in contact with it. Because when it is in contact, the colour looks a lot darker then when it's not, 30ppm reading is for the dark colour, but if not in contact the colour looks lighter about 10ppm.
Cheers