i would like know when your dats die do you uses tap water directly out of your fruset while doing water changes?? i have read on aquarium fish magazine that while changing aquarium water directly from fruset will damage the fishes gills and other areas.. i know for quilte sometime that we all ran across baby dats bein sell and i have gone though at less a dozen or so of SDS.. i actually have a dat dieing on my now but i have raised he temp to 88F and it's keeping it alive..let me know how you change your waters and what do you think about this problem..