At Aqua One we have a huge range of water filters for drinking water, shower filters, bath filters. You can even get filters that filter the all of the water that comes into your house.
We have both portable and undersink systems as well as ceramic water filters. We assemble our filters here so we can put together whatever combination of water filter you need for your boat, caravan, fish tank, or beer making.
The best carbon water filters are made from coconut carbon. Coconut carbon is considered the best or healthiest for drinking water treatment, charcoal is still used by some manufacturers as a more economic reasons.
The carbon is either broken up and graded into a granular form or ground into a powder and processed into a carbon block filter. Hollow carbon technology is now the latest advancement in carbon filtration providing 10 times the surface area of standard granular carbon with considerably higher flow rates and substantially higher filter capacity. Hollow carbon is derived from granular form.
How Does Carbon Work
Carbon filters remove or reduce contaminants physically trapping them or by adsorption. Each piece of carbon is generally activated with a positive charge and is designed to attract negatively charged water contaminants adsorbing (this is the opposite to absorption) them as they pass over the carbon surface area. The bigger the surface area of the carbon and the slower the water flows through the carbon, the higher the removal of contaminants.
Carbon filters are very effective at removing chlorine, chloroform, amonia, herbicides, pesticides, algae, dirt, sediment and other volatile organic compounds (VOC’s) from water. For removal of heavy metals and total dissolved solids you will need a reverse osmosis membrane as well.
While carbon filters remove contaminants they also remove chlorine and other sanitisers that kill and prevent bacteria growth within the cartridge. Therefore after a period of time bacteria will start to grow with carbon cartridges. For this reason manufacturers put a usable lifespan on their cartridges much the same as a use by date on food. This is usually 6 or 12 months; after this time the cartridge should be removed from the system and disposed of even if the system has only been used for a few days during the year.
Some cartridge filters do however use secondary media such as silver or KDF-55 to prevent bacteria growth within the filter. This media cannot really be said to kill bacteria but more inhibit its growth, providing an unpleasant environment for it to grow.