Oh I have Tiger Bloom as well, but I'm not going to start using it until week 3 or 4 when it starts flowering. I'm going to get dolomite lime tomorrow, doesn't that help with cal/mag as well as ph?
Actually I've been thinking about growing 5 in the 3.4l pots (what they are in now) and only transfer 4 to 3 gallon pots. Then that 5th plant is like free weed :)