You can never go wrong adding a deli shrimp, it's just like when a fish dies in the rockscape & rots, if your tanks ready to go, it will handle it - to be sure & safe, add one & mush him up a bit to speed up the rotting & test for another week.
if you want to go the speculative route, if you saw nitrites, that is what the ammonia converts too, so you can be fairly assured you just missed the ammonia spike
a great read...
http://www.reefsanctuary.com/forums...something-cycling-breaking-new-reef-tank.html
and one tip every experienced sw reefer agrees on...
A collection of sw reefing tips for success - can you spot the recurring theme?
Be Patient. Ecosystems do not develop over night!
Go Slow, relax and enjoy every step of the process.
Have lots of patience, don't rush it.
Nothing good ever happens fast in a saltwater tank.
Learn the art of GO S-L-O-W!! patience will be your biggest virtue.
Just remember to go slow and do your research
Go slow....slower than you think
The trick is to go slow...
The best advice anyone here has give me is GO SLOW
Rules for Reef tanks 1. Go SLow 2. Go slow 3. GO slow
Nothing happens fast in a salt tank except bad things so go slow
The biggest advice that I could give you is that you should go very slow
Just go slow. Slow, slow, slow is my best advise
Go slow and do things right and your setup will thank you for it later
Remember the number one rule of reefing,,GO SLOW...
Go slow and enjoy..never rush any decisions ever..do nothing on impulse.
Go slow, and during that time, read, and practice the maintenance routines of water changes
A reef tank is like a race car. The faster you go the harder you crash
"gospel" of reef tanks ... go slow...