First Water Qual Test

[HaZRaTTy]

Hey,

So my tank has been up and running for I think about 2 weeks in which I've added about 40lbs of Live cycled Rock and 20lbs of base rock. The last week i've seen brown Diatoms forming on the sand and glass which have decreased and gone pretty much away.

Values as follows

Nitrite - 0
Nitrate - .5
PH - 8.3
Ammonia - 0?
Alk - 6 < Is this too high? WC?

Salinity is 1.024

Correct me if i'm wrong but I believe the tank went through a Small cycle not having good test kits and finally having them I wasn't able to watch for the Swing in Nitrites and Nitrates but Diatoms are clearing up at the end of that cycle as I've read.

Any comments?