Make sure your circuation is as high as you can get it. If your ammonia is above 1.0 change the water (50%). Look at the rock, if you have any area that are black or dark brown scrub the with a soft brissle brush and rince them in a seperate bucket of SW and return them to whatever you are curing the rock in. If you have a skimmer use that as well. You dont want to let you ammonia get high, that will just kill off additional bacteria. You need space between the rock for good water flow. I use a childrens swimming pool to cure LR.