As far as fluctuating I know that with tanks that are being established there will be a spike in the ammonia then that will lower then a spike in the nitrite then that will lower, then the nitrates.
This is wrong.
Your tank died from the typical ammonia poisoning. The ich was secondary because your fish were sick from ammonia poisoning.
There should NEVER be an ammonia spike. ammonia kills in minutes to hours. If it's detectable, you needed to do a 50% water change immediately.
On the next restart, just use easy modern bacteria laiden products.
Seachem Stability - bacteria in a bottle.
CaribSea Instant Aquarium - bacteria in substrate.
Activ-Flora - bacteria in substrate.
With these bacteria laiden products, there should be no ammonia spike, which is instantly deadly.
Get a Seachem Ammonia Alert
http://www.petsmart.com/product/index.jsp?productId=11147371
To instantly detect ammonia and do something about it. As in, change 50% water right away.
Minimize feeding for the first 2 weeks. 1 meal a day. Your tank is not ready to process food wastes.
I put my fish in on tank setup day #1 all the time. Nothing bad happens. The TV show Tanked, they put fish in on day #1 all the time. Nothing bad happens. You just need to buy products that have bacteria that eats up the ammonia. And 50% water changes as frequently as necessary, initially, as often as daily to weekly. Most likely 1 water change every 3-6 days, until the tank stabilizes.