I have an artificial pond/waterfall that does not currently have fish but does have algae.  I would like to install a red worm filtration bed to remove the organic buildup in the pond and, if possible run some of the water through strawberry towers and thereby reduce the nutrient content.  Is it possible, in this situation, to grow plants without introducing fish into the pond?  There is a lot of organic build-up from leaf loading so I could feed the red worms for quite some time.…