Buy toilet chemicals online and in store from BCH Camping. Buy toilet chemicals from suppliers such as Thetford and Elsan. We have a variety of toilet chemicals for the flush part of your toilet (usually pink), or we have a large variety of chemicals for the holding tank (usually blue). We also have product that do both like eslan organic for example which can be used for both the flush and the holding tank. Buy elsan toilet tissue and thetford toilet tissue that degrades with water.