Nutrabal is the best known, but as nicky said, any branded multi vit powder is fine as long as its in date.
The calcium powder can be like calypso, or a branded one, a non branded calicum powder or indeed your own powder made from cuttle fish.
Again as Nicky said, use each twice a week, but of course not at the same time.
If its leos you have, wont do any harm to put a small bowl of calcium powder in the viv as well.