Aqua Kem Green is Thetford's septic safe waste-holding tank toilet additive. The biological action stimulates the breakdown of solid waste and toilet paper with outstanding odour control.This is suitable for use in septic systems and pit toilets. Features Assists in breaking down solids in an environmentally friendly way. Child Proof cap Plastic bottle has measuring marks Do not exceed recommended dose Specifications Model: T30253 Cequent 1 Litre bottle Dose 150ml to a 20 litre cassette ( 7 Doses) Septic safe Last 3-4 days Shipping Weight: 1.38 Kgs. Shipping Dimensions: 27 cm x 8 cm x 8 cm.