Kordon Ich-Attack for Fresh & Saltwater Aquariums - From petco.com Kordon Ich-Attack is an easy to use treatment composed of 100% multiple organic ingredients for all types of external and epidermal single-celled infections. It's broad spectrum of activity and lack of toxicity makes Ich-Attack effective without requiring a specific diagnosis. It stops infectious and external parasitic invasions from getting started and in turn prevents many secondary infections. In short, Ich-Attack suppresses and eliminates a wide spectrum of infections.A helpful advantage is that water changes are not necessary between daily treatments, saving on having to use tap water and their conditioners each day, or for marine aquariums in having to replace saltwater each day. The Napthoquinone ingredients of these organic herbals are as effective in salt water as in fresh water, providing an entirely new and effective way to handle coral reef aquariums without having to remove the marine invertebrates during treatments.