How quick can you add soft corals, polyps and such?

[sasscuba]

My 125 has been up and running with 150 pounds of LR for 6 weeks. I added a lawnmower blenny 2 weeks ago and a yellow tang yesterday. I am going to add a new fish about every 2-3 weeks now but what about corals and such. Can you add mulitiple things or one at a time. Don't want to rush it. Do they affect water params like fish?

Thanks.

[jag1979]

I added some soft corals when my nitrates got below 20 and they are all fine. My trates are now 0. I don't think corals negatively affect water params unless they dye or get sick.