Activated carbon water filters are another option for removing natural compounds such as tannins and improving overall water quality. This technology uses a filtration process known as adsorption, causing the water's contaminants to stick to the surface of the filter media, while water particles can pass through. As with all water filters, they have a limited capacity, but most have a life of at least 6 months, with some systems lasting up to 2 years.
The only setback of these water treatment systems is that activated carbon filters aren't as effective as other methods - they're made to help with chlorine and lead removal - which is why it's best to combine this type of filter with an RO membrane or oxidation systems. Considering these filters are usually included as one of the many different stages of RO filters, if you're interested in an activated carbon filtration purchase, you may want to make an investment in an RO ultrafiltration system.