Do you have a machine with a diesel exhaust water filter? You can keep the filter clean by using Tam Additive everytime you change the water. If you have a diesel water filter the water should be replaced every 8 hours. This special additive should be added each time the water is replaced to assist in keeping the system clean. The dirty water must be treated as hazardous and disposed of in the appropriate manor. Using Tam Additive will improve the water purification by neutralizing sulphuric and sulphurous acids and nitrogen oxides. This product is available in convenient bottles of 150cc.