I recently bought a vertical hydroponic kit, it comes with a growing media which is soft sponge like pebbles.
It seems like it crumbles even with water flow, and very fine sand covered the bottom of water tank. The material is also so light, so it is pulled by pump and the filter was clogged.
I tried a couple of things but they just delayed the build up on the filter.
I want to change the entire growing media, what would you recommend as a replacement?