Yet another coincidence. I was just doing a search on this topic, and I have the exact same #6 pack. My tank is a bit over 2x the size, so I can follow a similar regimen.
However, from other threads I've been noticing lately, it seems like folk dose traces every day or every other day. Is that a better approach than a couple of ml's at a water change?
I'm still trying to figure out why my NO3 doesn't drop much throughout the week, even though my tank is heavily planted and my growth is decent (...and maybe that's a good thing!). Just got my LaMotte 3110 test kit, so I can start doing some reliable NO3 tracking...