At first glance, the idea may draw a smile. Slipping a sock into a pool’s filtration system seems more like a DIY hack than a real maintenance gesture. Yet, this method is increasingly circulating on social networks, especially in Spain, where pool owners use it to limit impurities before they reach the main filter. Behind this very simple reflex lies a fairly concrete logic: better to trap small debris right at the start of the water circuit.
A Sock to Retain Impurities in the Pool
To understand its value, one must look at what happens before the usual filtration. Surface water is drawn into the skimmer, also called the skimmer, this opening located on the pool wall. It pulls in leaves, insects, pollen, hair, and sometimes even animal fur. The skimmer basket captures the most visible elements, but it lets through some of the fine particles. These then continue their journey toward the pump and the filter, which must do the work on their own.
That’s where the sock comes in. Placed in the skimmer basket, it acts as a fine-mesh prefilter. It captures part of the residues that would otherwise have continued toward the main filter. Result: the filter gets dirtier more slowly, the pump works less hard, and everyday maintenance can become easier. This trick obviously does not make the water clean by itself, but it helps relieve the filtration system, especially during periods when the pool is heavily used.
In the Pool Skimmer, the Sock Must Stay Firmly in Place
The method was notably popularized on TikTok by user @lenayvida_pami22, who shares tips about country living, gardening, and pool maintenance. In her video, she demonstrates a particular way of placing the sock, not simply stretched in the basket, but installed upside down, reports Okdiario. The reason? According to her, when the sock is poorly positioned, “the water recirculation makes it rise and end up spreading all the dirt.” By fixing it differently, water keeps it more at the bottom of the basket.
This detail is important, because a poorly installed filter sock can lose part of its usefulness. It must stay firmly pressed, without forming large folds and without hindering suction. If it rises or turns over in the basket, the trapped debris can disperse again. The goal is therefore not only to place a sock in the skimmer, but to check that it stays in place. An old thin sock can help out in a pinch, but there are also models designed for skimmers, sold in bundles.
A Low-Cost Accessory for Better Pool Maintenance
The appeal of this trick is also economical. In Spain, where there are more than 1.3 million private pools, maintenance often represents a substantial budget between products, water, electricity, and cleaning. A filtering sock is inexpensive and can extend the intervals between cleans of the main filter. It is particularly useful when the pool collects a lot of dust, pollen, or when animals swim, because their fine hairs often end up circulating in the water before being sucked in.
However, vigilance is required. A sock that is too dirty ends up blocking water flow and can force the pump to work harder, which negates the intended effect. In the peak season, it is therefore better to check it every day or two, rinse it with a jet of water, and replace it when it is too worn. This method does not substitute for chlorine, pH control, or basin cleaning, but it can become a small, effective habit to keep the water clearer and to preserve the filter for longer.
