Wikipedia Sand Filter
Filters should be cleaned by backwashing when pressure increases from 34.5 to 68.9 kPa, or weekly by a service professional hired to maintain a pool. An annual filter cleaning with a chemical cleaner also helps to remove limescale, grease and oils from the filter sand. Larger materials, such as leaves, gravel and insects, cannot pass through the sand and even smaller materials stop if your pool water moves through the filter container. Particles that initially pass through the filter can later be filtered when your pool water returns through the filter.
At the beginning of a new filter run, the efficiency of the filter increases simultaneously with the number of particles captured in the medium. During filter maturation, the effluent may not meet the quality criteria and must be re-injected into the installation in the steps above. During backwashing, water is pumped back aquarium sand filter through the filter system. The backwash water can be partially re-injected against the filtration process and the generated wastewater must be discharged. Sand filtration is used for removing suspended solids and suspended and submersible particles. Wastewater flows vertically through a thin bed of sand and/or gravel.
Very often it is the result of overlooking an annual chemical cleaning of the sand, or it may be because the filter is due to a change of sand. The three keys to a clean and healthy pool are circulation, chemistry and filtration. However, the latter is often overlooked when problems arise. Circulation is generally not a problem, as most pools are designed with pumps, filters, plumbing, and the proper placement of skimmers and returns. In most cases, water chemistry is the first cause of problems, such as green or turbid pool water, but it can be easily remedied. After the water is well balanced, the clarity of the water should improve within a day or two.
Filter sand – The sand in the filter is the most important part. Sand removes almost all pathogens and dirt from the water. Educational articles about the world of the pool along with others who are more aware of safety during the summer. With some room for lighter texts to read from the hammock in a relaxed position. At GRE you will find everything you need for your swimming pool. The sides in the sand filter can break, causing the sand to find its way into the pool.
They are very easy to maintain and clean and you do not have to replace the filter media all the time. Not only that, they are extremely durable and can withstand anything you throw at them, unlike cartridge filters that can yield under certain conditions. The sand in the tank only needs to be replaced every 5 years or so. This makes sand filter systems very easy to maintain as the tank only needs to be opened when the change needs to take place.
All you have to do is turn the filter to your backwash setup, plug in a rewind hose, and drain it for a few minutes. This process removes excess debris and allows the filter to retain most of the sand. You should replace the sand in a conventional pool filter once every two to three years. However, it may be necessary to replace the sand annually if you have a small Intex or Bestway filter above the ground. Functional sand filters retain all the sand after the first cycle. Some sand can get into the pool after adding the sand, but it should not come out afterwards.
The above-mentioned processes, such as filter maturation and backwashing, affect not only the quality of the water, but also the time required for a complete treatment. If a certain amount of water is to be supplied to, for example, a community, this water loss should be considered. In addition, backwash residues must be properly treated or removed. When taste and smell can be a problem, the sand filter may contain a layer of activated carbon to remove the taste and smell. The sand filter is your easiest and simplest option to install and maintain if you want to keep your pool water clean and crystal clear. There is information here in this blog that explains how to build a slow sandwater filter.