Just found that that my van was billowing steam out from underneath (luckily only after a short trip, so hopefully it didnt damage heads etc) on inspection it turns out there are/were 5 jubilee clips holding the short hose between the plastic pipe from/to radiator and the distribution thingy

What I would like to know is..... does it need a specific antifeeze, it was a greeny colour that came out.
secondly is it common to have multiple jubilee clips on these joints??
Any help will be appreciated
Take care
Pete