Comparison Bestway 56405 vs Bestway 56251

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.

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.

Performance of the pump supplied with the pool (see above).

It refers to the amount of water that the unit can pump per hour. Knowing this amount and the volume of the pool (see above), you can estimate how long it will take to filter it.

Note that manufacturers usually choose the performance of a complete filter, based on the optimal compromise between good speed and low cost, as well as the weight of the unit itself. Therefore, in fact, this parameter may be required mainly in the case of searching for a replacement for the standard filter.

The main material used in the construction of the pool. Usually, the material of the walls is indicated in this paragraph. They are usually made of various polymeric materials — for example, PVC or vinyl.

The quality, reliability and durability of the pool directly depends on the material of the walls. However, it should be borne in mind here that the same material can be presented on the market in several varieties. In addition, various additional tricks can be used in the design — for example, multilayer walls. Therefore, it is worth evaluating the quality of the pool not so much by the claimed material, but by the general price category of the product (compared to models of a similar volume and functionality).

General dimensions of the pool in the unfolded position. In general, this is a fairly obvious parameter, we note only a couple of important points:

— In the largest models, the length or diameter can exceed 6 m, in the smallest ones it does not even reach 2 m.

— Note that the frame pool is supposed to be filled with water by less than 80%. Accordingly, the maximum depth of such a structure will not exceed 80% of the total height. For example, it is customary to classify products with a height of more than 125 cm into the category of deep frame pools — accordingly, the working depth in such models is more than 1 m (125 * 0.8 = 100 cm, that is, 1 m).