- New
3378 is a 4-litre septic treatment from Mirage 2000 designed to control odours in all types of RV holding tanks. Its formula contains no formaldehyde or phosphates and helps liquefy solid waste to facilitate tank emptying. It also helps clean tank sensors and lubricate valves. Non-corrosive and formulated not to stain, this treatment is a practical addition to your recreational vehicle’s sanitation maintenance routine. Follow the product label for recommended dosage and use instructions.