Thetford Aqua Kem Green Concentrated
Every cassette or portable toilet needs something in the tank, and Aqua Kem Green is Thetford's septic-safe answer — a step away from the older blue, formaldehyde-based chemical, aimed at owners who don't want to think twice about where they're allowed to empty.
Key features
- Septic tank safe, ISO 11734 certified for biodegradability
- Liquefies waste for easier, cleaner emptying
- Reduces gas build-up and controls odour
- Concentrated formula — 75ml dose per 20L waste tank plus 2-3L water, lasting up to 4 days per dose
- Available in 750ml and 1L bottles
RV use case
This suits owners who tour through areas where dump points feed into septic systems, or who'd simply rather not run a formaldehyde-based chemical through a portable toilet on principle. It's a straightforward swap-in for anyone currently using traditional Aqua Kem Blue.
Pros
- Septic-safe formula widens where it's actually appropriate to empty the tank
- Concentrated dosing means a single bottle covers a reasonable stretch of touring
- Widely stocked at caravan and camping retailers, easy to keep topped up on the road
Cons
- Some users find odour control slightly less aggressive in hot weather compared to the older formaldehyde-based Blue
- Dosing needs to be accurate — under-dosing noticeably reduces performance
- Still a consumable running cost, unlike a one-off hardware purchase
Best for
Owners who need or prefer a septic-safe toilet chemical, particularly those touring through regions where septic-only dump points are common.
Verdict
A sensible, widely available default for a cassette or portable toilet — the septic-safe formula is the whole reason to choose it over the traditional Blue.
Thetford Aqua Kem Green Concentrated bottle
Diagram showing where Thetford toilet chemicals are used in the system
Chemical being added to a cassette toilet waste tank
Concentrated formula shown next to the original Aqua Kem Green