The Pool Filter Sand Exchange
Today we’ll talk a bit about the exchange of the pool filter sand.
We already know that water filtration is an important step in the physical treatment of the pool.
We should not underestimate this step with the risk of having a milky pool, whitish, with an opaque appearance.
Many people ignore and a lot of people make the exchange the sand filter and do not even know why!
First let’s talk about the time of the exchange of the sand filter …
When changing the sand of a filter pools?
The changing of the pool filter sand takes place on two occasions:1- lack sand in the filter.
1. lack sand in the filter.
2. When one realizes the sand filter saturated.
And when it is missing in the sand filter?
The sand filter generally does not diminish in considerable amount when in use within the filter (despite losing a bit of sand whenever you make a backwash).
But it may happen so, the level of sand in the filter decrease due to some problem in the filter.
The most common problem that leads to loss of sand, is when there is a defect in a filter part called crepina.
When some crepina breaks into the filter, the filter loses some of filtration capacity and will gradually losing its sand.
It is easy to see when the filter crepina breakage because during operation of the filter, it throws sand into the pool for return nozzles.
Usually only realize the sand when it stops at the bottom of the pool.
And when the sand filter is saturated?
We say that the sand filter becomes saturated when it is so dirty that lose their filtering capacity.
Some accelerate the process of saturation of the filter sand:
Using aluminum sulfate vacuuming the pool filtering after using aluminum sulfate as a decanter is extremely harmful to the sand filter since it combines the sand it.
So, all that sand actually has seen a lot of “gravel” and we know that the higher are the grains of sand, the greater will be the dirt that will return to the pool through the same filter. (see our text where we explain why not use aluminum sulfate )
Suck a lot of dirt: many will wonder, after all the filter was made for this, however, when the pool is heavily soiled, it is interesting to note the possibility of vacuuming dirt to the sewer so that all that dirt does not pass through the sand filter.
Sometimes vacuuming the pool filtering is very harmful to the sand filter.
Lack of backwash: it is interesting to backwash and rinse the sand from the pool filter when the filter is no longer 100%!
If even after backwash and rinse filtration is not efficient, it is probably about time to replace the sand filter.