Your filter is the part of your Carrollton pool doing the quiet work of keeping the water clear. There are three common types, sand, cartridge, and DE, and they are not interchangeable in how they perform or what they cost to run. Knowing which one you have, and how it likes to be maintained, makes the difference between clear water and a constant fight with cloudiness.
The three filter types, briefly
A pool filter pulls water through a medium that traps dirt and debris, then sends clean water back to the pool. The three types use different media:
- Sand filters push water through a bed of sand. They are simple, durable, and cheap to maintain, and they filter to a moderate level of fineness.
- Cartridge filters use a pleated cartridge. They catch finer particles than sand and run at lower pressure, which is easier on the pump.
- DE (diatomaceous earth) filters coat grids with a fine powder and filter the smallest particles of the three, giving the clearest water, with the most involved upkeep.
Which filter is right for a Carrollton pool
For most Carrollton homeowners, a cartridge filter hits the sweet spot. It filters finer than sand, runs efficiently, and the upkeep is straightforward. Sand filters are a solid, low-cost choice if you do not mind slightly less fine filtration. DE gives the clearest water and suits owners who want the highest clarity and do not mind more hands-on maintenance. The right pick depends on how clear you want the water and how much upkeep you want to take on.
How to maintain each type
Each filter wants different care, and getting it wrong is a common reason for cloudy water:
- Sand: backwash when the pressure gauge climbs about 8 to 10 PSI over its clean reading, and plan to replace the sand every several years.
- Cartridge: rinse the cartridge regularly and deep-clean it periodically, replacing the cartridge when it wears out.
- DE: backwash and recharge with fresh DE powder as needed, and break down the grids for a deep clean a couple of times a year.
Whatever type you have, a filter that is clogged or neglected cannot keep the water clear no matter how good your chemistry is. Staying on top of filter maintenance is half the battle against cloudy water.
Signs your filter needs attention
Watch for cloudy water that will not clear with balanced chemistry, a pressure gauge reading high, weak return flow, or debris blowing back into the pool. Any of these means the filter is asking for a clean, a part, or in some cases a replacement.
Frequently asked questions
What is the best type of pool filter?
For most homeowners, a cartridge filter offers the best balance: finer filtration than sand, lower running pressure, and straightforward upkeep. Sand filters are cheaper and simpler but filter a bit less fine. DE filters give the clearest water but need the most maintenance. The best choice depends on the clarity you want and the upkeep you will keep up with.
How often should I clean my pool filter?
It depends on the type. Sand filters get backwashed when pressure rises about 8 to 10 PSI above the clean reading. Cartridges get rinsed regularly and deep-cleaned periodically. DE filters get backwashed and recharged as needed. In every case, clean it sooner if the water turns cloudy or the return flow weakens.
Why is my pool cloudy even though the chemistry is balanced?
A clogged or worn filter is a common cause. If the water stays cloudy with balanced chemistry, the filter likely cannot keep up, whether from a dirty cartridge, sand that needs replacing, or a part that has failed. Cleaning or servicing the filter usually clears it. Poor circulation can also be the culprit.
How long do pool filters last?
With regular maintenance, a filter tank often lasts well over a decade. The media is what wears: sand needs replacing every several years, cartridges every few years depending on use, and DE grids periodically. Replace the whole filter when the tank cracks, when it is badly undersized, or when the internals are beyond saving.
Keep your Carrollton pool clear
Whether your pool runs sand, cartridge, or DE, we know how each one likes to be maintained and we keep yours working across Carrollton, from Josey Ranch and Indian Creek to the Rosemeade area. See our pool service in Carrollton or request a free quote.
