Volume
The working volume of the pool is the amount of water that is standardly contained by the product.
Usually, the working volume is indicated based on the occupancy of the pool at 80% of the maximum capacity. With such a fullness, there will be enough water inside for normal use and at the same time it will not overflow when the next person is immersed in the pool or when waves occur.
The capacity of the pool directly depends on the volume: the larger the tank, the more people will be able to swim in it at the same time. In addition, more capacious models are often also
deeper. On the other hand, a large capacity correspondingly affects the cost and puts forward increased requirements for additional equipment: a powerful pump, a performant filter, an efficient drain system, etc. are needed. Accordingly, it does not always make sense to chase large volumes.
In addition, it is worth noting that products with the same volume can differ markedly in size and, moreover, in shape. So in fact, the volume often turns out to be a secondary parameter, and it is easier to choose a pool in terms of length-width-depth.
Filter
The type of filter that the pool is equipped with.
The filter is one of the most important types of equipment for swimming pools, including frame ones. It is responsible for cleaning water from dust, small specks and other contaminants. Considering that modern frame pools are quite capacious, it is easier, more convenient and cheaper to drive water through a filter than to change it entirely every time it gets dirty. Filters can be like this:
— Sandy. A device with a filter element in the form of a container containing fine sand of a special composition. During the passage of water, sand retains mechanical impurities, including rather small ones. One of the main advantages of sand filters is their high performance, they cope better with large volumes of water than another popular variety — cartridge systems (see below). In addition, filters of this type are reusable — if the sand is contaminated, nothing needs to be changed, it is enough to arrange a backwash. Among the disadvantages of this variety, one can note a relatively low filtration efficiency (including the inability to cope with chemical impurities), as well as large sizes. However, in many cases, the latter is not a disadvantage — the size of the filter is still small compared to the dimensions of the tank itself, and such a device is placed outside the pool, and you can choose the installation location so that the filter does not create any inconvenience.
— Cartridge. In accorda...nce with the name, these filters use special cartridges with filter elements in the form of membranes made of polymeric material. Cartridges are made disposable, with contamination and wear, such an element must be changed. This is associated with additional costs, but consumables are inexpensive, and initially cartridge filters are cheaper than sand filters. Another advantage is their relatively compact size. The speed of operation of cartridges is lower than that of sand systems, however, such a filter can still be made sufficiently performant even for a fairly large volume of water. Thanks to all this, most modern frame pools are equipped with cartridge devices.
