I believe if you scroll down to the section on How Anthurium should be grown on the link below you will find what you need to know.

In nature this plant does not typically grow in soil but instead on the branches of trees. They grow well in soil that is very porous as well as filled with humus which is typically acidic.

Steve
www.ExoticRainforest.com

Here is a link that might be useful: Anthurium