The King British Water Purifier is a pack containing six tubes of which each tube treats up to 100 litres. It is a no mess, no hassle essential weekly filter treatment containing a blend of nitrifying and bacillus bacteria to help improve water quality in tropical, cold water and marine aquariums.

The Water Purifier can be used once per week as part of the regular aquarium maintenance, after any partial water changes, after using any medications especially anti-bacterial medications or if you have a water quality problem such as an increase in ammonia or nitrite.