Flatworm eXit itself is quite safe to fish and invertebrates. However, the body juice of flatworms can be toxic to some reef inhabitants when present in a too high concentration. This body juice is sometimes excreted when flatworms die. When using this product you will need to: Siphon out as many flatworms as possible. Keep sufficient fresh activated carbon in a canister ready. Turn off UV, ozone and remove activated carbon. Keep the skimmer turned on. 10 ml. Treats up to 300 gallons. Dosage: 1 drop for every 4 liters or 1 gallon. The dropper contains approx. 300 drops (10ml). The dropper cap holds approx. 90 drops. So 1 cap full is good for 360 liters or 90 gallons.
