Water Effects

On my computer most of the dreams that show water the effects seem to be too be accelerated.  On all of the waterfall dreams I have downloaded the water is falling way too fast and it spoils the effect.  The same applies to the light relection on the water on 'forest river'.  Is there anyway I can slow these down because the dreams are awesome but the sped up graphics completely spoils the ambience the dream is trying to create.