Hi everyone!
I've had my 29g BC up and running for a whole 5 weeks now.

I'm going to get flogged for this but I added 6 hermits and 3 shrimp (1 peppermint - 2 camel) about a week and a half into it. I thought it was okay because my nitrates were at 20ppm. Okay flog me - I thought that 20ppm was okay.

My ammonia and nitrite levels were at zero. Anyway, they're doing just fine and they have all molted once or twice and the hermits are moving into bigger shells, etc.
I did a 5 gallon water change on June 16th and since then my parameters have been good.
Today they were -
Nitrates - 2.5ppm
Ammonia - 0
Nitrite - 0
Calcium 300ppm
kH - 8
Phosphates - 0
I get my replacement water from the LFS and the calcium is always low. Even after the water change it was only at 320ppm. I have some coraline algea, but it isn't growing very fast and it's bright green (does that matter?).
So now what? I'm thinking of adding some more live rock - I only have 30lbs of it - but I am wondering if that will wreck havoc. I don't have to have it, but it's a want.
Should I buy a fish or something? I'd like to have a ton of corals but not so many fish. What would you do?