"Allyb" wrote in message ...
Yeah, I'm new at this and a little confused about the pmdd dosing schedule.
I read that you're supposed to keep your nitrates at 10 ppm, but the pmdd
dose only adds a tiny amount. Even if the plants didn't use any, it would
take months to get up to the recommended level. I guess the pmdd people
don't think you need to keep 10ppm in.

snip

Instead of using PMDD to add nitrates, I suggest using KNO3.