Add diatomaceous earth (DE) to your pool skimmer, stick to around a scoop or two – no more than the size of a 1lb coffee cup. The moment you do this, go to the pool jets to see if it is returning DE into the pool, or if the water suddenly looks cloudy. If it is, you likely have an issue with your filter.
If you've noticed that the backwashing cycles have become shorter, then you should check to see if the sand filter is dirty or greasy. If the filter is dirty or greasy, then don't be surprised if it takes on the appearance of sandy lard. When this happens, the water doesn't flow through the sand filter media.
When do I need to replace my sand? On average, sand should be replaced every 3-5 years. This may be longer if the pool stays clear, or shorter, if the filter runs all the time. The jagged edges of the sand wear down and become smooth as the sand ages.
Given enough time, you will not want to even touch the water because it'll look like a swamp. If your water looks good and the water in your pool is moving well, then your pump is working.
It could be something blocking it, a dirty pool filter, or too much air in the system. If there's something blocking your pump's suction, check your filter gauge. If it's 10psi above the normal reading, clean your filter.
Look into the clear glass in the strainer lid while the pump is running. If you observe bubbles in the water flowing through the strainer, you probably have a suction leak.
Put your hand over the inlet (where the basket is located on the side of the pool, not the pump) to feel if there's enough suction. Your hand should be sucked up against the inlet fairly quickly if the pump is set to its highest mode. If it's barely pulling, you likely have a clogged filter or a leak in the line.
To find out which specific pipe is blocked, run your pool pump and check each line by itself by shutting off the other lines (skimmer lines, main drain line) and looking at your filter's pressure gauge. If a specific line has lower pressure than the other lines, then you've found your blockage.
Although it's generally recommended that all the pool water undergo filtration every 24 hours, the pump does not need to run all the time. A proactive, productive and energy-saving maintenance activity is to remove the debris floating on the pool surface with a hand-held skimmer.
How Often Should You Backwash a Pool Sand Filter? As a general rule of thumb, you should backwash and rinse your filter about once a fortnight. The optimal time is right after you vacuum the pool. However, if your pool has had a lot more use than normal, it may be necessary to backwash once a week.
Add diatomaceous earth (DE) to your pool skimmer, stick to around a scoop or two – no more than the size of a 1lb coffee cup. The moment you do this, go to the pool jets to see if it is returning DE into the pool, or if the water suddenly looks cloudy. If it is, you likely have an issue with your filter.
How Much Sand to Add to Pool Filters? Sand filters are not filled completely full of sand, but only about 2/3 full, to allow “Freeboard” space in the tank, above the sand bed.
Too much sand and your filter will likely not run correctly or may break when reassembling. Too little sand and you will have cloudy water no matter how much your filter runs.
Frayed or Tattered Filters
A sure sign that your cartridge filter needs replacing is if the filters themselves look frayed and tattered. This means that they've already exceeded their lifetime and they can no longer filter out your water properly.
If water is slowly coming into your pool pump, check the skimmer door to make sure it isn't stuck. Also, make sure your pool's water level is halfway up the skimmer. If the skimmer door and water level look good, you may have a clog in your skimmer line.
What are the symptoms of a clogged impeller? If your pool pump impeller is clogged, it's probably making some unpleasant noises (a low, grinding sound). If you look at your filter pressure, it's likely only half of what it normally reads and the water in your pump is moving slowly or making a swirling motion.
TroubleFreePool.com explained that when your filter is brand new, water can easily pass through the system without issue. However, as the filter continues to do its job, debris can accumulate over time and slowly clog the system. As a result, pressure builds up within the filter and continues to rise if not cleaned.
Also, do not try using a plumber's "snake." A snake typically doesn't work on pool pipes because pools use 90-degree elbows and house plumbing uses 90-degree "sweeps," which allow the snake to round the corners. Also, a sewer-line snake should not be used on a pool for sanitary reasons.
Another reason for pool filters clogging quickly is excessive debris. Your pool filter system is designed to trap debris like leaves and grass clippings in the pool water. If there is too much debris, the pool filter will get clogged quickly.
Broken laterals and snapped seals are the most common reasons your filter is blowing sand into your pool water.
If air is getting in your pool through the skimmer housing, then the pool filters will be starved of water. This will result in poor water filtration and cleaning.
A stream of bubbles is a sign of the unwanted presence of air within our pool's plumbing system. This air is likely the cause of a sucking air leak from a pump, union or diverter gasket. The leaks and the air pockets they form will lower water pressure and greatly decrease the capacity of our filter system.
A suction side air leak shows itself most commonly by bubbles and splashing and frothing in the pump basket This indicates your pump is not getting the water it needs to function smoothly but, instead, air is getting into the system and starving or semi-starving the pump.