Tank Cycled already?

[clownchick22]

Well here is my current setup:
I re-arranged my LR with more caves, and such. Also, no rock touching the glass so I can keep that glass clean!



90 Gallon Hagen Tank
70 lbs of LR (20 from LFS and 50 from a local guy)
Berlin HO Skimmer
AquaClear power filter
2x Maxi-jet 1200's
1x Hagen 301 with Cannister filter
2-3" DSB

I tested my parameters last night, and it reads as follows:

Ammonia 0
Nitrite 0
Nitrate 0
PH 8.0
Salinity .024
Temp 78-80

Is it possible that my tank could have cycled already? It's only been a few weeks, and I have just added the extra 50lbs of LR late last week..
I'm not going to get any fish for a few weeks, however would it be ok to add a few hermits and such?