i have dwarfs. they are doing well. there has been one delivery of babies, seven born alive, one dead. they eat constantly so you must have live brine hatching before they arive. they seem very hardy and stable. they prefer to have the light off, they will swim more. i only run the filter for a few minutes at a time because the current is too strong for the babies. if you need any more info email me at raianne@hotmail.com