I'm hoping to have the new tank (210) filled with sand and water in the next week. I'm buying sand from a BNARC member that just tore down his 125 and I've been cooking my Pukani rock for about a month now in my old water each week (from my weekly tank water changes.) My question is, how long of a cycle do you think I might expect? I'll be putting rock from my existing tank into the larger one after the cycle too but not until it's safe. I have too many critters in and on my rock that I'd like to preserve (feathers, peanut worms, bristle worms, etc.) Another question is that I plan on lightly washing the sand before I transfer into my tank. Would you use RO/DI or salt water for that? The tank is only being emptied before I get there and won't have sat in containers long. Thanks for the input!