All the filters come with everything you need to install them quickly and trouble free. We have pre-fitted the fittings, which means you only have to put in the cartridge and connect the included hoses. Cartridge change is done easy and quickly as well, with all our different types of filter housing, and wrench is included where needed. You can see our installation videos here: https://www.holmbladwater.com/installation

There are several reasons why we have chosen not to sell reverse osmosis systems: Preservation of Essential Minerals: Coconut-based activated carbon block filtration ensures a healthier and more balanced drinking experience by retaining all healthy and necessary minerals in the drinking water. In contrast, reverse osmosis systems filter out beneficial minerals from the water, resulting in "dead" water that tastes flat and is also less healthy. Efficient Filtration without Water Waste: With reverse osmosis filtration, only a portion of the water is utilized, and for every liter of clean water produced, 2-8 liters are discharged directly into the drain. With both our activated carbon block and activated carbon block with membrane, all the water is utilized, thus avoiding water waste, benefiting both the wallet and the environment. Higher Water Pressure: With reverse osmosis, the typical water pressure is around 1 liter per minute, while with carbon block filtration, the water pressure can be up to 8 liters per minute, making daily use significantly easier and more practical. Improved Taste and Odor Removal: Coconut-based activated carbon excels in improving taste and removing odors from the water, providing a more pleasant and refreshing drinking experience. Reverse osmosis systems can leave the water tasteless and devoid of natural aromas. Sustainability and Environmental Friendliness: Using coconut shells, a byproduct of the coconut industry, for water filtration is an environmentally friendly choice. Coconut-based activated carbon promotes sustainability by recycling waste, while the production of reverse osmosis systems can be resource-intensive. Cost-Effective: Coconut-based activated carbon block filters are generally more cost-effective than reverse osmosis systems. The maintenance and replacement costs associated with coconut-based filters are often lower, making them a budget-friendly choice in the long run. Easy Installation and Maintenance: Coconut-based activated carbon block filters are designed for easy installation and are suitable for both households and businesses. Their simplicity extends to maintenance, providing a hassle-free water filtration solution compared to the more complex maintenance requirements of reverse osmosis systems. Energy Efficiency: Coconut-based filtration operates without the energy-intensive process that reverse osmosis entails. This makes coconut-based activated carbon block filters a more energy-efficient choice, contributing to a greener and more sustainable water filtration solution. Compatibility with Various Water Systems: Coconut-based activated carbon block filters are versatile and compatible with different water systems. Whether integrated into a home filtration setup or used in commercial contexts, coconut-based filters offer flexibility in their application.

There are several reasons why we have chosen to offer our products at the prices we do. Firstly, we buy in bulk from a range of handpicked producers around the world, which allows us to obtain reasonable prices for our purchases. Secondly, we are based in Spain where our costs are simply lower. Cheaper rent and lower costs should benefit our customers. This is also why we have chosen not to open an office and warehouse in Scandinavia, Germany or other countries where we sell our water filters, which would prevent us from maintaining the current prices. Thirdly, we have decided to sell all our products at the same prices in all countries. Water filtration should be accessible to everyone at a fair price, regardless of whether one lives in Denmark, Spain, or Greece.

All our water filter cartridges consist of pure coconut-based activated carbon. Coconut-based activated carbon is made from coconut shells, which are a surplus/waste product from an already sustainable coconut production, where no trees are felled, thus providing a sustainable and long-term source of raw material. Additionally, all water is utilized, and no water is wasted in the purification process, in contrast to, for example, reverse osmosis filtration, where 2-8 liters of water are wasted for every liter of purified drinking water.

PFAS consists of up to 15,000 different chemicals and is extremely difficult to filter out of water. The best and most expensive osmosis systems can filter out about 90-95%, but they have a number of drawbacks that you can also read about on this site. Currently, there is no technology that can filter all PFAS out of water, but a significant reduction to well below the threshold values is also possible with methods other than reverse osmosis filtration. All our cartridges can reduce PFAS by about 70-75%. For the best possible PFAS filtration, however, we recommend our Ultra+ models, which consist of two combined activated carbon block cartridges that give the PFAS substances twice as long a path through the carbon, thereby significantly increasing filtration.

We will send you an email one month before it is time to change your cartridge, making sure you have time to order a new cartridge. The reminder email will also be send even if you have bought more than one cartridge, to make sure it is changed in time.

Tap- and pitcher filters generally rely solely on filtration through granular activated carbon. While granular activated carbon is effective in removing odor and taste, as well as a small range of impurities, the limitation with this type of filter is that they often contain a very small amount of activated carbon and "only" use granulated carbon, which has a filtration capacity of about 1/10 of an activated carbon block cartridge. Furthermore, the time the water spends in contact with the carbon, especially with small faucet-mounted devices, is too short to provide efficient filtration. See also our overview of filter types: Filter comparison

A TDS tester is a tool that can measure the amount of dissolved solids in water, including minerals and salts. A TDS tester is often used by some companies as an indicator of water quality, which is misleading, as a TDS tester cannot measure impurities in the water. Therefore, a TDS tester cannot tell you whether your drinking water is healthy or not; it only shows how conductive the water is. For example, an activated carbon filter does not filter out salts and healthy minerals from the water, which will result in a high PPM reading with a TDS meter. However, these minerals are something you definitely do not want to miss in your drinking water. This is likely also the reason why companies selling reverse osmosis water filtration systems swear by TDS meters, as reverse osmosis filters out all the healthy minerals from the water, thereby giving a low PPM reading. However, a low PPM value does not mean that the water does not potentially contain viruses, bacteria, pesticides, PFAS, medication residues, microplastics, etc., as none of this can be measured with a TDS tester. A TDS tester can make some sense in areas with potentially very dirty water, and readings of 1500+ PPM can indicate that you should not use the water for daily consumption. However, if you want to test your water for impurities, the only reliable solution is to send a water sample to an approved institute and have it tested specifically for the impurities you want more information about.

Yes and no. A rolling boil for at least two minutes is effective in killing harmful organisms such as E.coli, giardia and cryptosporidium. However, boiling does not remove many other contaminants such as pesticides, PFAS, heavy metals, chlorine etc.

The filter housing is 31,00 cm high and has a diameter of 10,50 cm. It takes up the same space as a normal wine bottle, so you can test if you have the space available like that.

The different cartridges can filter between 5.000 and up to 36.000 litres. Actually some of them can filter up to 100.000 litres and still perform well, but we do advise to follow the recommended changing intervals to avoid any chance of bacterial buildup. In certain areas and even locally in some streets and buildings the water and/ or piping can be in a state where much more material and general dirt, rust and other substances are added to the water, which can fill up the cartridge early and therefore begin to perform poorly. Under souch circumstances the cartridge will need to be replaced earlier.

All our 10" drinking water cartridges can handle temperatures between 5 and 50ºC

The Activo Mesa is 33,50 cm high and has a diameter of 14,00 cm.

All our 10" drinking water cartridges fit in all drinking water filter housings. So if you either want to increase the filter level or virse versa, it is not a problem.

With our coconut activated carbon block cartridges you will be able to filter out 100+ impurities, but for filtering out staphylococcus and E.Coli you will need our 4 stage ultra fine UF Pro cartridge, which uses a ultra fine membrane of only 0,1μm (micrometers).

All our cartridges are made of food grade materials and totally lead and BPA free, which means you can throw them out with your normal garbage.

You will find many shower water filters with 10 or 15 stage filtration and claims about benefits and filtration abilities that sound almost too good to be true. A shower water filter has however a limit to how big it can actually be and still be practical and fit with most shower setups, meaning the amount of material that can be used for each filter layer is limited. Therefore a 15 stage shower water filter will have a very limited amount of material in each layer. This might not matter much with most of the layers as they do not make any difference and just make it sound "amazing", but it also means the materials that will actually make a difference, is very limited. In all efficient shower filters you will find a high amount of calcium sulfite, KDF 55 and coconut based active carbon. Those are the ones to look out for if you want your water filtered efficiently. Some will however cut corners and use cheaper KDF and traditional wood based carbon, which is not as effective. So make sure when choosing your next shower water filter you know what materials are used and do not be impressed with claims that the high number of layers actually does anything better for your skin, hair and most importantly, your health.