Thetford Aqua Kem Blue Concentrate LavenderThe Thetford Aqua Kem Blue Lavender Concentrate is now an even more powerful cleaner than the original Aqua Kem Blue 2L. It helps to keep waste holding tanks clean and smelling great. It's easy to use and, once applied, will liquefy any waste and reduce gas build up, making the job of emptying the waste tank much more pleasant. The concentrate version gives exactly the same amount of dosage as the standard version and will not only save space but