what went wrong

[whistlerskipro]

Sorry about the confusion: I added the dead coral to increase the overall filtration. I didn't think the original 40lbs was enough. More is good?
I believe by removing some of the original LR (two weeks ago) caused the tank to crash . Question: Can base rock (the dead coral) replace the old established LR in two months? I don't think so. So I am thinking I am now dealing with my tank trying to re-establish itself.
Maybe I am completely wrong and it may be something completely different. I am very new at saltwater tanks.