Use 1 cup (240 ml) of Re-Mover PLUS for every 50 gallons (190 liters) of water. Re-Mover Plus does not usually have to be used in a filter bag. Place in your sump, filter, canister filter or other part of the system where there is good water flow. Re-Mover PLUS™ does not need to be replaced, it can be rinsed and re-used if necessary.