"I3 I L L" wrote in message
ups.com...
Hello, Greg Watson's PMDD formula should be arriving Monday and I was
wondering how should I go about measuring the nutrient levels? I
already have a test kit for nitrate but what about other nutrients?

Try Tom Barrs formula with 50% water changes weekly, much cheaper and
simpler than screwing with test kits. With only a bit of adjustment you can
work out what is best from that point.
bob