Hi thank you for replying I added the right amount on the first day and going off my chart for testing it was saying it was really low I mean the colours on the chart range from yellow then through greens until u get to blue which I'm aiming for it doesn't seem to be changing from the first colour. How can I be certain to trust the calculator when I haven't seen the ammonia rise at all. And I plan on keeping guppies, corys, glowlights and a fighter but it's really depressing me because that's looking a long way away with how this is going