In this segment, the filters of the company «Geyser» and «Aquaphor» are considered the best due to the fastest cleaning speed and large volume. You can read about water: Water filters — reviews. The main disadvantage of such models can be considered a small size of cartridges. The average performance of the cartridge is 150 ml of water in 10 minutes. Also, such filters cannot boast of their resource (about 400 liters). You will have to change cartridges once a month.