I've had about 40lbs of it sitting in my sump for nearly two months now. This after soaking, bleaching, and air drying (I removed quite a bit of old dried gunk doing this). Early in Jan., I'll use about a third of it to augment the LR I've had in my 40g 'LPS' tank. The rest stays where it is until needed.
All things considered, dried rock is only slightly less work than the so-called real deal, imo.
All things considered, dried rock is only slightly less work than the so-called real deal, imo.