Caravan Accessory Shop are suppliers of market-leading caravan toilet chemicals from Thetford. Their blue chemical for waste holding tanks is known as Aqua Kem and their pink chemical for flush water tanks is known as Aqua Rinse. Caravan Accessory Shop also stock a range of economical toilet chemcials from Kampa and B-Fresh and toilet tabs - which ensure you get the correct dosage every time - from Dometic.