I use Castle non-biological soap powder for the whole family's washing. I did and do still separate baby's laundry from ours. I do it now mainly because of the difference in size of the loads and the degree of 'soiled-ness'. Babies' clothes don't really get as dirty (unless they get poo or foodstains) so I prefer to use a shorter wash for baby laundry and a hotter, longer wash for ours.