Now that I'm seeing my cycle move along, I'm anticipating a fully cycled tank and have one question. My tap water is untreated well water that only runs through a sediment filter. There are no chemicals added at any point. Out of the tap there are no ammonia, nitrites, or nitrates, and a high-ish pH. After my cycle is complete, will I need to continue to use Prime? I'm thinking the only benefit would be to protect in the event of an undetected spike or mini-cycle, but even then it wouldn't offer any protection after the first 24-48 hrs, right? Obviously if I was changing something about the tank, like adding fish or snails, I would need to anticipate a possible fluctuation, but otherwise can I use straight water?