Not right now but I’ll post some tomorrow: :) I didn’t wash the sand which frustrates me as I knew I should! Set up tanks before and never forgotten but somehow did this time round. I’ll test the water regularly as routine, I think the short version of my question earlier was whether I needed to let the tank cycle of its own accord or not... that would have been a bit more succinct..!
Another question, the new rock was just short of 14kg dry, assuming it’s super porous (it definitely is), what is the wet actual weight likely to be?
You can let the tank certainly cycle fishless, and just sit out the timeframe. However, if you've got established liverock I'd certainly say it's ok to transfer everything over (not the sand in current state).
Remember the larger volume of water, allows for more generosity on the parameter levels. However by not adding more fish, you're just having the same inhabitants just in a bigger tank. So all the unseeded rock will catch up whilst the current LR does the breakdown of ammonia, NitrIte and NitrAte. Sometimes it is advised to know if any new rock being added contains phosphates IMO, but again some people don't even test for them and go by visual signs :)
As for weight of wet rock, I'm not sure I can give you that answer. I'd probably weigh a big piece try, then wet it and weigh it again. Then do the math.