I'm planning on cycling a new tank for an octopus and was told to just Dr Tims with dry rock and would be fine in a few days. I thought live ocean rock would be better but curious if I run the tank at 68 and the lights would be toned down if that would be a large loss using live rock? (especially since its warmer waters that it comes from) What kind of die off should I expect and how long? Should I Dr Tims with the live rock? Was also informed to remove the rock for acclimation then replace it all afterwards so I guess I'll be setting up a rubbermaid can for a couple days for the rock. But how would you guys cycle a cold water tank with limited light?