Hi there all ! I have a problem with a newish pool that I feel I need help with.
The pool in question is 20 cubic meters. I live in Southern Spain . In my area there are many pools. They vary in size but we all have the same water source, and we all buy the same chem from the same shops. All the kit in my pump house came from the same shops as every one else. My friends have lovely clear pools. Not me. Every spring I balance the water, and keep all my levels absolutely correct. Many of my friends are very sloppy. They have clear pools too. Mine starts out fine but after a month one can see a light cloudy haze to the water. Not green. White. The same colour as the fine dust that coats everything around here. This clouding will increase until the bottom is invisible. It is as if the water is full of very fine particles. I shock every two weeks. I keep a good algaecide level but algae loves dust. Ok the lady at the shop and many forums say shock with algaecide and chlorine and run the pump for 24 hours to deal with this. No change even after 36 hours on one occasion.
OK so I add flocculant and yea clean water. BUT I have to vac to waste SO carefully so as not to stir up the brown floc gunge on the bottom that I have to top up a lot. This makes the pool colder. There are always some bits of flock suspended in the water so filter them out no? After 12 hours or so the water is the same and in five days it is cloudy again so more floc etc etc. Thus the summer cycle of floc top up, floc top up begins and carries on until shut down for the winter.
NOW the pool was fitted out by a real pool pro BUT he was on medication at the time and made a mistake with the prozone system and fitted it backwards. He has since retired to the UK. Now I got a good price because he was using up stock and I wonder whether he has mismatched the pump and filter. I remember him saying that I had a really good pump. "It will pass your whole pool through the filter every three hours" he said and it does. (the pool will pump out in around three hours)
The pump is rated at 250 to 100 litres per minute (depending on head) and the filter has a capacity of around .5 of a cubic meter. This seems to be a lot of pump for a tiny filter and I am wondering if this is why I have troubles that no one else has. I am wondering if fine dust is being forced through the filter sand, or if the water is coming at such high volumes that it makes holes in the sand to pass through. It really does seem as if my filter does nothing. Shutting the return vales partially to keep the pressure up to the edge of the yellow, or in the yello makes no difference. I am wondering about getting a electricity clever friend to make a device to reduce the voltage to the pump to get things down to around 5o L per minute.
Any thoughts from those that know would be great. Thanks. Raz