Also, sometime mags have internal infections that eventually kill them over the course of a week or so. As far as changing water parameters, the general point of view that I've heard is that getting the mags into the best possible water parameters, sooner rather than later, is the objective. I suppose that may depend on what the parameters are. I personally feel that the ideal acclimation from less ideal to more ideal parameters is achieved through repeated water changes, no dosing, getting the specific gravity to 1.026-1.027 and a temp. around 80 and nitrates undetectable. Once you do that, it's a matter of time to see if the anemone can become established.