Old school reefer here so you can ignore my comments. I think your reef is too young, need to let it mature and become stable before diving into sps. I also don't see how you are consuming that much alk and calcium. I run a far from clean system similar in size to yours with colonies and frags I have grown from slivers and I do not consume as much as you do. Maybe double check your test kits, then just let things get stable and start with a couple frags. Many ways to do this but I truly do believe in letting s system mature for best sps success. Are your rocks growing sponges yet?