The only thing is that the entire kit is not really Tierlieb. The "glass" is a plastic cup with curious form, which can easily tip over if you drankommt or so. Not exactly suited to a whole population to receive it alive. If more salt one gets, one can also use a separate, larger vessel, which is significantly better. It also survive more of it. In the manual it says that it is normal that so few animals survive. J ABrowse no wonder with first 20x overfilling the small container.