Maytronics, the manufacturer of Dolphin pool cleaning robots, invests large amounts in improving pool robots. Naturally, a great deal of attention is paid to the filtration system. Maytronics is focused on producing a perfect yet easy-to-use filtration system. This has meant that, in recent years, it has undergone major changes.
The oldest filtration system is a filter bag. All dirt is collected in the bag, with water travelling freely through it. The system works well and also catches small dirt particles, but is slightly more maintenance-intensive.
Filter bags need to be cleaned with a garden hose to ensure all dirt is washed out. When doing so, it is important that the bag is turned inside out first. Some dirt particles are hard to remove and remain in the bag, but this does not adversely affect filtration.