Chemistry

To begin with, I am sure I am not alone in struggling to accurately determine low levels of phosphate in the marine aquarium. I have tried most of the test kits including Red Sea, Elos, D-D and Salifert, and the problem for me comes in determining what colour the sample is, especially on low levels – sound familiar?

I have also tried the Hanna handheld checker for phosphate and phosphorous, but really struggle getting the powder out of that little sachet without spilling it everywhere.

It...