I'm upgrading my 125g to a 250g. I plan on transferring the 125 gallons of cycled water to the new tank and then want to add the remaining 125g with mixed saltwater with RODI
. My question is this, when I'm mixing the new 125 gallons I intend to add to the tank, can I add the instant cycle stuff you buy at the petstore to the mixed water, let it sit overnight, then add to the tank? Or do I mix the water, without the instant cycle stuff, let it sit overnight, add the water, then add the instant cycle stuff to the whole tank?
What would be the best way to do this? Realize, I will have only a half-full 250g tank with coral, fish and live rock and will want to get the system running as soon as possible, for obvious reasons... But cannot run it until the tank is full.