Thetford Eucalytus & Grey Water Fresh Concentrate Contains x 1 Thetford Aquakem Blue Euclyptus 0.78L and x 1 Grey Waste Fresh Concentrate 800ml. Thetford Grey Waste Fresh Concentrate 800ml: Concentrated, strong, effective fluid which prevents nasty grey water smells. Gives nasty smells coming from the drains no chance! Overview: Reduces deposit formation in the grey water tank Outstanding grey water odour control Keeps the grey water longer fresh and clean Odour free discharging of your grey water tank Concentrated 800 ml Thetford Aquakem Blue Euclyptus 0.78L: Aqua Kem? Blue Concentrated Eucalyptus is one of the newest members of Thetford?s well known Concentrated family! Aqua Kem? Blue Concentrated Eucalyptus leaves a scent of wellness behind in your RV! Overview: Attractive eucalyptus fragrance with a touch of mint 1 dosage lasts up to 5 days Convenient small bottle, less weight* (* compared to Aqua Kem? Blue 2L) Significantly improved waste liquefication for easier tank emptying* (* compared to Aqua Kem? Blue 2L) Significantly improved reduction of gas build-up* (* compared to Aqua Kem? Blue 2L)