Same thing happend to me, except I got an answer from Julia yesterday and she told me they had difficulties with both computers and with getting fertilizers in stock.
But she manages to ship my order yersterday ... so I presume the same with your order
I am a little anxious as the tank is going very well, and I am now out of N. I just eliminated BGA via blackout recently and the N was a big part of this.
Don't want to have to start over or for the plants to suffer.........
I will try and find some calcium nitrate locally (not sure where to buy it) or some flourish or similar.
I was able to find KNO3 at a Nursery/Garden place -- and they were willing to sell me just a pound of it ($4 or so). The nurseries in the big chain stores won't have it, but a smaller place might.