:frustrat: Your tank would have cycled fine without the shrimp. I am sorry people told you to dd shrimp. Any organics introduced to your tank starts a cycling. You introduced organics by introducing live rock and live sand. Depending on the amount of organics introduced the intensity level can be pre arranged, IE a hard cycle would be a cycle where your ammonia quickly climbs unnaturally high and therefore forces the beneficial bacteria to multiply and turn nitrites formed by ammonia break down into nitrate quickly. All caused by an extreme level of organic introduction. However most tanks do not have the capacity for much denitrification so the nitrates build up and must be reduced by water changes. Deep sand beds are good at denitrification (turning nitrates into a gas), as are the oxygen deprived bacteria living deep within live rock. The typical shallow sand bed does not, or does so very poorly, and live rock contain very little of the denitrification bacteria to turn nitrate to a gas. The bacteria that turn nitrites into nitrates is an oxygen dependent bacteria and therefore is mostly on the surface and near the surface of live rock and live sand therefore is prone to being killed off by changes in conditions, removal from water, storage in low oxygen conditions etc.. The bacteria is seldom ever completely killed off and therefore it can repopulate your live rock and live sand. However, trying to do such things quickly also means unnatural stress on the rest of your system, like the pH, alkalinity, dissolved oxygen content, redox. It usually means a lot of death of higher life forms, like zoo plankton and fish and such. A lot of people are not very patient when it comes to processes which are naturally slow. Cycling is a naturally slow process. Some people think what they kill off initially is OK as they can quickly add a level of fish which would be an overload if done after a slow mild cycling with out causing another spike in ammonia and the follow up problems like low pH, nitrites and nitrates. If you do things slowly you preserve more life forms and maintain more natural diversity. You develop and maintain a system with more differing strains of bacteria and have therefore a broader more diverse base for continued growth with fewer chances of system crash due to overdeveloped narrow based bacterial systems.
What were we talking about. Oh yeah, hopefully people live and learn instead of living without learning. I do not mean to offend you , just warn you. Lesson, "Do not add shrimp or food on top of normally present organics to cycle a tank or cure live rock, no matter what someone tells you in the future, it is not worth it." It wasn't worth it 35 years ago, 25 years ago, 10 years ago and still is not worth it now, yet people still do it. :^: Maybe this should have been developed into an article, whoops. :bounce: