You may or may not notice a rise in death rate after the first week, as this is about the time the fry have used up their yolk sacs, but the fact that they're eating well already is great.
Personally, I think if you get ANY SH fry to adulthood on your first go-round, you're doing well. It really does take learning from others as well as figuring out what works for you.
Interestingly enuff, my very first ever SH were about 50 erectus fry that were shipped to me in a couple of drinking water bottles from Chicago from a friend, so I was not only new to SH, but was rearing fry! I managed to get two really nice males from that bunch, and I felt accomplished! Plus, I had a lot of great advice/support.
So don't give up, and you'll no doubt put your own spin on your fry setup/rearing as you go along. Beth (Peka) and Dan (DanU) are great resources (they're about as successful as you can get, and they know erectus very well).