I am finally getting very close to putting water in my new (to me) 240 gallon glass tank. The stand should be finished today and then tomorrow I will test it with tap water for leaks. Hopefully by Sunday night or Monday I can start filling with Salt Water. Here are my thoughts on adding this aquarium to my existing 200 gallon reef system. I would like opinions on whether I am off base or not. When I fill the 240 with water it will be bare bottom and will only have dry rock in it. I plan on bring all controllable parameters in line with my reef system over a period of a few days. pH, Temp and salinity are what I will concentrate on. When these are in line with my system I want to hook the systems together and start mixing the water very slowly so it will turn over the 240 gallons in say a day or two. Since I will not have any life in the 240 I do not see a reason to cycle the tank since my current biological filter can handle my bioload. It should be like doing a very slow 60-70% water change. Then I will start moving fish and live rock from an existing 55 gallon tank in my system (aggressive tank) to slowly convert this tank to the 240 and tear down the 55. The 240 will be the new home for my Puffer and Lion fish since the lion fish is starting to wear the 55 as a hat. They are both growing fast. So please punch holes in my theory if I am wrong.