That is a really good question. How do we seed a reef tank with everything that we want and avoid everything that we don’t? Or is the gamble worth the reward?Oh one thing that I forgot was that the sand bed in the old tank with homemade rock was also seeded with garf grunge. Again just trying to get that biodiversity. So I’m thinking it’s a consensus that biodiversity is key. The question is how do you get the best with out the pest????