Originally Posted by onefish2fish
good move, what kind of powerheads do you have (brand/model) and how many pounds of liverock?
I don't see an answer to this question. Looking at the picture, i think this part of the issue causing the ammonia spike. You have about 1/2 the normal amount of live rock for a typical aquarium. This is not to say that you can't be successful with less live rock, but we would have been better off to remove the filter media a bit at a time over the course of a few weeks.
I advice placing 1/2 of the media back into the skimmer. Wait until the ammonia drops, wait 1 week, then remove 1/2, wait another week and remove the remainder.
More on this tonight.
Again, what is the pH??