Aquasonic Vertonex 250mlTo assist in the treatment of white spot (cryptocaryon irritans) when corals and invertebrates are present in marine aquaria. Vertonex can be used safely with invertebrates and corals present in the aquarium. Note that corals and anemones may withdraw during treatment. Some Centropyge angels are sensitive to treatment also, with Bivalves (e.g. clams & mussels) should be removed during treatment. To maximise results, halve the daily dose rate, adding it to the tank twice (morning and night).