Sand Filter Onda
Good water filtration is important for good water quality.
The Onda sand filter offers a choice between side assembly and top assembly. Depending on your possibilities and own preferences, you can choose which filter best suits your pool.

The basic for your clean pool
The filter and pool pump are the basis for obtaining clean filtered water.
To obtain and keep the water clear and clean it is important that the pool water is pumped through a (sand) filter.
If you would not filter the water, bacteria, algae and fungi get a chance to develop in the pool water and adding products to your pool water is not very useful.

Maintenance of a sand filter
With a sand filter you should definitely do a backwash (minimum every three weeks, this can also be more) and after 5 years the sand from the filter should be replaced by new sand. If the sand filter has not been ciculating for a long time, the sand will start to stick together and you will have to replace the sand. Besides backwashing and replacing the sand you should also put superflock plus in your skimmer. Superflock plus is a candle-shaped flocculant used in sand filters for effective prevention and removal turbidity in the water. Due to ist patented formula, superflock plus dissolves slowly, which results in a long-term effect. Use superflock weekly for optimum results.

What do you put in the sand filter?
When the sand filter is delivered, it is always stated what it is recommended to put in the sand filter. You can put sand, glass filter media or flnt in the sand filter. Sand and flint come in different sizes. To determine what and how much you should add to the sand filter, it is best to look at the paperwork of the sand filter. Sometimes there is a choice between glass or sand, in which case you can of course choose.

Operation of a sand filter
In a sand filter the pool water enters the sand filter at the top and sinks down through the sand. Because the water sinks down along and between the sand, dirt from the water stays behind with the sand. This is how the water is filtered.
Because the water descends through the sand, a lot of dirt remains in the sand after a while. In order to clean the sand, a backwash (rinsing) must be carried out.
By performing a backwash (every three weeks), the dirty water is pumped through the backwash and goes to the sewer or to another drain.
After 5 years, you should replace the filter sand with new sand.
If the sand filter has not been circulating for some time, the sand will start to stick together and you will have to replace the sand as well.
The amount and type of sand to be used in the sand filter is always indicated on the sand filter.




The different settings of a swimming pool sand filter
There is always a six-way valve on a sand filter. Six-way valve, because six different positions, working with the sand filter, are possible.
Remember: If you change the mode, you must always switch off the pump!
If you do not do this, your pump may be damaged.

1. Filter: Filtering the pool water. The water goes through the pump to the sand filter. The clean, filtered pool water then exits the sand filter back into the pool.
2. Waste (Empty): This is to drain all the water out of the pool. This is only necessary when the pool is very dirty and needs a thorough cleaning.
3. Backwash: 'Backwash the water'. This is to clean the sand filter. The water goes out in the opposite direction (into the sewer or another place).
To Backwash, you must first turn off the pump! Then first set the six-way valve to backwash and switch the pump on. The water now flows in the opposite direction. Backwashing takes 1 to 3 minutes. If you look through the sight glass of the sand filter and the water is clear again, it is sufficient.
4. Rinse: The six-way valve should be placed in this position immediately after backwashing. You do this for 30 seconds. On the Rinse position, the water goes from the top to the bottom while it is discherged into the sewerage. In this way, all the sand is returned to its place.
5. Circulate: This position is to mix certain products with the pool water as quickly as possible. The water is drawn in by the pump, but does not pass through the sand filter.
6; Closed: Now all outlets are closed. You must now turn off your pump as quickly as possible, because the pressure builds up rapidly. The closed position is mainly used when working on the sand filter.

In short, the six-way valve is usually on the 'filter' position.

How long do you have to filter the pool water?
The more your water is filtered, the better your water quality. This is very clear.
But how long should your filter run?
Well:
The outside temperature is less than 20°C, let the filter run for 12 hours.
If the outside temperature is more than 20°C, let the filter run for 24 hours.
Tip: Set the filter operating time with a clock. So you can choose to let the filter run overnight.

Filter pump and sand filter separatly
Suppose you already have a separate filter pump and sand filter, but the filter pump breaks down.
Then you can also purchase a filter pump from us and vice versa, if you only need a sand filter, you can also find the sand filter with us.
Both for the filter pumps and sand filters, there are various brands available such as Triton, Tagelus, Starline, PPG, Superflo, MCB, Ultraflow,...
For more information you can find the various pumps and filters on our site or you can always reach us by mail, info@stesha-wellness.com or feel free to visit our shop in Houthulst.

How much flow rate should my filter or pump have?
To know how much flow rate your swimming pool filter and pump need to have, there is a general rule: volume of the swimming pool in cubic metres (m³) divided by four.
So: number m³ : 4 = The necessary flow.
E.g.: 18m³ : 4 = 4,50m³/h for this you have to take a pump and/or filter that is at least as heavy, certainly not lower! It is always better to have some margin than to calculate with a small margin.
Hereby you can be sure that the water is sufficiently filtered and the more the water is filtered, the better the quality of the pool water.