My 4 ft has been setup for around 3 weeks and all
tests have normalised. I have decided to add my old corals into
the big tank. I transferred them by putting them in small containers
underwater without exposing them to air. I then gradually added
the new tank water to the containers and when it had completely
mixed after about 10mins they were placed on the sand.
They opened up within about 30 mins. Its starting
to look like a reef tank now. :-)