OK, I'm setting up a Tang community tank. 75G drilled tank with sump. I will be using RO/DI water with Seachem Rift lake salt, and Tang buffer added to try replicate as close as possible the ideal water params. Here is the question: Should I use the RO/DI Buffered water for my fishless cycle? Or should I just use tap water for the cycle, and then at the end of the cycle do water changes with RO/DI Buffered water to bring params to ideal numbers?