So I decided just to use one of the old pieces of live rock that I have in my temporary tanks with my fish cause the ones at the store were trade in and they had aptasia :-(. Anyways, I put a single piece in with the rest of the rock (no sand) and for the life of me, I cannot get ammonia readings to go above 0. Over the last 3 days I have been adding a cube of frozen fish food each day and still ammonia reads 0. No nitrites, no nitrates, steady pH. What's up with this? Is the biological filtration of that rock just super good? Or is there a better way to add ammonia to the tank cause I aint reading any...