Elos products are a favorite among Bulkreefsupply.com. Elos SvC is a powder-like zooplankton coral food which provides nutrients to filter feeders and other organisms capable of capturing the small particles within their polyps. We recommend target feeding with this product. Elos Omega Amino Acid is beneficial for stony coral health and polyp extension. Elos Pro Skimmer Liquid SPS Food acts as an energy boost for corals reducing the need for live foods and the demand on your protein skimmer. Elos Extra Vitamin Liquid Fish Food Supplement works as an additional nutrition boost to any brand of marine fish food you choose to use.