Zeo has introduced a new product that increases the immune system of the SPS corals and allows the coral to repel the acro eating flat worms (AEFW ). it is called Flatworm Stop. it is a 3 month process, but visual improvement should start as soon as 2 weeks. my first thought was " gimmic product," but i cannot see Zeovit taking this route. i have high expectations for this product.