budboy
Non-member
If I remember correctly it was 2 drops for every five gallons, used it recently and worked great for me,suppose to remove coal bag, need to extract as many flat worms as fast and as possible, although flat worm exit is not dangerous to a reef tank the toxans given off the dead flat worms are deadly to a tank. or just by a coral banded shrimp or six line wrasse to help with the worms, they eat that stuff.