Product labelsUpdated 2 months ago

On some bottles, the contents of APT are listed in percentages.
On others, in ppm. They look very different? 

Per fertiliser regulations, newer APT labels show content in percentages (e.g 0.7% Total Nitrogen)
Older labels list certain compounds in ppm (e.g. 5ml per 100L adds 1.8ppm NO3 ) 

They look different because they are stating different things.

1.8ppm of NO3 refers to a specific compound (NO3), and at the specific concentration of 5ml per 100L.

0.7% Total Nitrogen refers to the nitrogen element only (in the bottle) and calculated per regulatory requirements on how 'Total Nitrogen' is defined (in the same way that the food industry has continually evolving regulations that determine how, say, 'protein' is defined)

In summary:

The old 'ppm' labels represented the contents in hobbyist vernacular. Newer labels reflect current fertiliser regulations.

APT's unique Capstone Formula has remained consistent, with subtle improvements year after year.