Softies at most 30 minutes but try and keep them wet. SPS no more than 15 minutes. I saw him frag a brain and it was out of the water about 20 minutes and he had a nucket he would dip it in every five minutes or so. This guy I know has been fragging for years. He use to be one of the guys that went out and collected the corals from the reefs. He would collect, frag, return them to a shallower reef and collect later. He quit the business when the collector he was working for got too greedy and didn't care about the impact he was having on the reef.