Thats true, sometimes once I add everything to the res it's right about perfect, the water around here changes a lot though, both PPM and PH. You can run longer than a week, some people go two to three weeks with it, you just never know what is left in the nutes specifically. Like I said, I do a week and a half usually. The good part about stuff like flora-nova is the fact that it is pretty cost effective, especially with a ten gallon res.
What's your take on nute change timing mass?
One week in the veg chamber with no nutes added yet? If so they could probably take 300 allright, how tall are they? I can't stress enough how concentrated this stuff is, it only takes about a cup and a half to do my 55 gal. so start low and creep up on it.
No prob. on the thread jack, that's what this place if for, you'll get it all figued out.