Pete,
> I don't know that particular nutrient, but if it contained DAP there
> is a maximum level in the US. They usually adopt the GRAS standards,
> (Generally Regarded As Safe). 4 grams per US gallon of DAP is pushing
> it. Can you find out what is in it and work backwards? Each nutrient
> is different, sorry I can't be more help.
> Regards,
> Joe
Thanks for your help Joe. I should be able to figure it out from that information.
Cheers, Pete