Out of the mouth of babes comes wisdom in complexity. I'm truly sorry to bother you with this but I have another question from the kid. I am letting him do the readings for our tank while it is cycling. We use the API freshwater kit and in our excitement threw the instruction booklet away.
We know how to put the drops in and in the proper quantity but the kid raised a good question. Do we hold the test tube against the card when comparing readings or do we hold it away from the card. When I place it flush against the card I get a different reading as compared to about 1 inch away from the card. It's not much of a difference but it does change the readings ------ someone please also remind me to not have any more kids --- they hurt my brain