growing water lilies-what soil?

Hi from the UK. I'm looking for some advice about the specific soil requirements for water lilies. In the UK there are many companies offering aquatic compost/fertiliser/soil, but nothing specifically for lilies. What additional nutrients would they benefit from?
Thanks for any help

Steve there is a very good discussion on planting medium for lilies going on at:(just highlight copy and insert in the address box)

http://watergardening.infopop.net/3/OpenTopic?a=tpc&s=689290654&f=399290654&m=8782956861

This is the Water Gardening Magazine Pond Forum and the debate is raging.

Thanks for the thread- you're not joking about the raging debate are you? It seems a clay based medium is best. Cheers.

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