What can we do if the sand filter in poor filtration ?

What can we do if the sand filter in poor filtration ? The follow solution you can refer.

1，Backwashing:

(1), Activation signal

backwashing is mandatory when the sand filter pressure gauge reads ≥0.2 MPa (excessive pressure can cause the filter media to cake, leading to a sharp drop in filtration efficiency).

(2), Standard procedure

Firstly,Turn off the water pump ;  

Secondly,Switch to "Backwash" mode ;

Thirdly,Turn on the pump and backwash for 3–5 minutes (until the water at the discharge outlet runs clear) ;

Fourthly, Switch to "Rinse" mode for 1 minute ;

Finally,Resume normal operation; ensure no filter media is lost during the process.

2，Filter Media Maintenance:

The filter media is the core component of the filtration system; failing to replace it after five years can result in a 50% drop in filtration efficiency.

3，Replacement Cycle:

It is recommended to replace quartz sand every 2–3 years and activated carbon annually. For superior filtration performance, consider using modern glass filter media; it offers greater hardness, higher filtration efficiency, and significantly improved backwashing performance. With a lifespan of up to 15 years, it has become a popular next-generation choice for pool maintenance.

Filling Technique: Lay a bottom layer of coarse sand (3–5 mm, 20 cm thick) and a top layer of fine sand (0.8–1.2 mm, 40 cm thick); layered filling enhances filtration precision. When used with specialized filter media, turbidity removal reaches 99%, resulting in visibly clear water.