Filtration

[Deauville]

Before attcking the ground with the mini-pelle I thought I'd best do some research and have now got to No.3 on the list - 'what filtration system?' It will be a modest sized, semi enterée, unheated pool with very light use and we don't fancy the idea of smelling of chlorine, or depleting the ozone layer or breaking the bank. Any advice greatly apreciated, Thanks

[Poolguy]

Deauville

Don't particularly understand your question - don't think that swimming

pool filtration has any effect on the Ozone layer (I could be wrong)

For designing a good filtation system you should caluclate the volume

in meters3 of water in the pool and size your pump and filter to move

all of it through every 3 hours.

I have written a piece on the different filtration methods earlier

which I refer you too. So I suggest you buy a quality pump, sand filter

combination and fill it with Zeolite to get the best filtation results

(1 micron)

If your sanitization regime is working correctly then there will be no

smell what so ever, it only smells when you have neglected your pool.

If you need specific help in the design of a pool water quality system then PM me and I woud be happy to help.

Andrew

[Deauville]

Thanks Andrew, the ozone reference was in relation to the debate on the merits of saltwater systems and their possible environmental issues. Saltwater appeared to be the way forward until recently but would now appear to be dropping out of favour, or has my research reached the wrong conclusion? Are saltwater systems a good alternative in your view?

[Poolguy]

Deauville

So its sanitization systems that you were concerned about, not filtration.

Using a saline solution as a method of generating chlorine is many decades old

but has recently drawn flack from Environmental legislation, which prohibits

the dumping of backwash water from pool using this system. As I have posted

many times, as a consequence of growing water shortages in many countries, the

notion of destroying 75 cubic meters of water by dumping salt into it is

unthinkable and delinquent to the extreme. And so the system is becoming less

favoured in exemplar countries In this climate of concern for the

environment, more modern systems of using liquid chlorine in minimal quantities

has grown in favour and delivery systems are now at a very sophisticated level,

in all providing many times better pool management performance that the old

antiquated salt electrolyser.

Your reference to the ozone layer therefore I presume is a side comment to the

effects of chlorine in ozone depletion. Its worth noting that manual

sanitization using gallettes, chlorine direct injection and salt electrolyses

produce chlorine in much the same quantities, and therefore has much the same

effect on the ozone layer. None of this is particularly significant in the

current ozone depletion debate as there are countless other contributors to

this phenomenon which do many times more damage - cow and sheep farts to name

one.

So as a consequence, my position which I have maintained throughout 3 years of

contributions to the forums is that the use of salt as a sanitisation method of

choice is unsustainable, impractical and unenvironmental in the face of

alternatives which are proven to be superior in every aspect of their

performance and their consequences.

Andrew