Compost bin querie?!!!?

you can have as many worms in as you wont but earth worms are not really the right type, you wont some brandling worms. there the ones that live in compost, you can get these from 2 places. if you no of any horse stables just pay them a visit and ask if they have a manure heap so you can collect some worms(look on the bottom edge where the manure is old) or just go into a local fishing shop and buy some.