sappersrest

This topic is going way off course now ,I would with respect ask the op to contact the moderater to lock it from further comments

4 hours ago, Saanim said:

The chlorine vapours (heavier than air) are laying on the water surface. And when there is not much air draft around - and the water is fenced off by a risen edge at the skimmer pools - the only way to dispose the vapours is by the deep breathing of the skimmer ????. 

 

totally incorrect the chlorine smell in badly managed pools is in fact combined chlorines, if you are into google research break point chlorination.

once again in a badly managed pool  stinging eyes and a shortage of breath is down to the formation of  nitrogen tri chloride  (tear gas) a reaction of hypochlous  acid   with is actually the killing agent when chlorine is mixed with water.

use google correctly and it is all  there, most university publish research papers just need to spend a little time.

low levels of chlorine are to be highly recommend if you have the time and a good test kit 1ppm is  ok with a low ph of 7.2 is possible

4 hours ago, Saanim said:

A high level of chlorinated water is not really much healthy for a swimmer even if he/she is not suffering under asthma problems. That is proven by many medical studies (reviewed approved by peers), many can be found by googling. (Even if some are suppressed by strong pool business).  And for kids this was found much more serious.

once again  correct but studies apply to indoor pools  the conclusions in most cases were due to incorrect water balance and poor ventilation.

the main cause was a high count of THMS in the atmosphere . not really applicable to outdoor pools.

but can occur with extremely heavy bather loads in poorly managed pools.

3 hours ago, Saanim said:

In my beginning years I too have followed many advices by professionals.  Later by my own backyard experience - and by reading other sources - I found that the professionals' advices - always maximalistic - mainly lead to their increased sale, so I had downsized and simplified many of my treatment procedures.  Most of the professional pool forums are owned by pool shops, so the sale of the chemicals and additional equipment - also re-constructions - keep them alive over the years, unlike a sale of pools (how many pools do you buy in one life?).

Again correct can't disagree with that

3 hours ago, Saanim said:

I do not claim any procedure, I just describe how it works in my pool over 15 years. It's up to everybody's common sense - and his own testing - what is the best for him. 

correct

11 hours ago, Saanim said:

Am I here correct in a forum for pool problems? 

 

Or is it here to show off how many professional years some have had?

The reason why several of us have divulged the no of years in the industry is because of late there has been some terrible and in some cases downright dangerous advice given  by those who think that  they know .

Yes it is a forum for advice , and in my case is given freely without bias.

As proffesionals we are bound to give industry standard advice which is in mot cases the same the world over.

By all means if you have a pool and want advice , please post.

There is no good bacteria in a swimming pool any bacteria is bad for your pool

Bacteria is only good in a sewage works, 

3 course media and  8 fine , 11 bags in total if i am not correct the official supplier will corect me.

Make sure it is reycycled plate glass ,  other wise you may not get what you expect , beware imitattions are about

It is certainly up to you, if you are happy with your 10 year old river sand and backwash weeklythat really is your choice.

People on this forum are certainly lucky bagwain and myself have over 60 years of experience and we are trying to give you and others good solid advice, you asked a question and the answer is yes your pool will look better its your choice no one is twisting your arm.

If you wish to help people on this forum please stick to industry standards when giving advice or making statements .

Thank you for your input.

13 hours ago, Saanim said:

That means, before with the sand, you did not have a clear water?

In my case I am having a clear water every day with my 10 yo sand (OK with few exceptions when the weather gets crazy). So can I have the water with the glass even more clear, more than I am now having?

    

If your river sand media has been in for 10 years I would certainly change it to glass media.

Siam pools in Chiang Mai is a good port of call he stocks glass media and of course the famous ecco crushed plate glass.You will certainly notice the difference not just in carity  but the water will have a certain sparkle 

The sand did come out rather well in the study .The reason is that the sand used in the test was a very high quality sand which has a very hard silica content .

It is not your usual run of filtration sand . it comes from an area in the UK called Leighton Buzzard as mentioned in the Test. This sand is now becoming rarer as the quarry only has a finite amount and will probably be dearer than glass media now.

It is a good filtration media used extensively in the UK, it used to be specified by name by all UK water treatment consultants.

I personally have examined this sand that has been in filters for 10 years or more and has not shown any signs of ware.

So in my mind the test is  skewed by the company commissioning the tests. why not use sand as supplied by the big named suppliers to give a fairer comparison

The company in question also produce and supply crushed bottled glass media non AFM why was that not included in their tests.???

AFM have a supplier in Thailand google is your friend.

Some one asked a while back how can you tell if the media is worn, very simple really a magnifying glass or a cheap pocket microscope.

If he sand shows no sharp edges or has been rounded it is worn out.

How to destroy the filter bed in your filter simple again, back wash weekly.  Filter beds need 3 or 4 days of use to settle. if fitted go by the pressure gauge fitted on your multiport, following the filter manufactures instruction.Or monthly should suffice.

As a general thought , the better end of the pool industry  have their own choice of products that they will offer to their clients and will try and push the sale of such item, profit is a small part of this but the main reason that items are tried tested  and above all this results in very happy clients..

As a parting thought there may well be a few cowboy companies out there, but from my personal dealings there are more cowboy customers.!!!

I am now retired. But if you need any information on pools etc  PM @BAGWAIN forum member, Swimming pools Thailand forum sponsors both great minds of information

Ok the usual suspects havent taken the bait, it is a grossly over engineered solution to a fairly simple problem.

A simpler solution involves a saddle clamp a few pvc fittings a valve and some one inch hose, answers on a postcard please.

You could try this or a variation of the theme it would have to be made out of pvc or 316 stainless steel

The concept is for introducing chemicals into a closed loop boiler system. But should work for your use. 

If not google dosing pots for a better choice.

19 minutes ago, Bagwain said:

Look up John at Siam Pools C/M!

Good colleague in the industry!

I am about to source 2 from him!

 

Probably will pop ln next week ,what make have you ordered out of interest.

Looking for it to heat in the winter, and cool in the summer any thoughts would be greatly appreciated.

Prime brands such as astral and certikin are properly graded for filtration and are first class products , i have used many hundreds of tonnes of each, doing a rough ang ready calculation I have been responsible for a good few thousand tonnes of filter media in my working life 9  tonnes on average per filter vessel

Comercial and  domestic pool filtration work on exactly the same principles save for flow rates,   I have been in the industry for 30  years now retired .

1 hour ago, unheard said:

And what's your experience with backwashing?

Even the linked brochure mentions the ecoglass' media high angularity which would be a huge impediment to proper backwashing - the angular properties of the glass don't allow the media to be lifted by the flow of the water which leads to reduced media expansion which in turn prevents proper cleaning.

The sand particles don't have that problem (being well rounded in comparison).

That is the point angular filter media is better once sand gets rounded it is u/s

1 hour ago, unheard said:

Can you provide any reference to the brand of the glass media  used by olympic facilities?

Recycled bottle glass media (loaded with bacteria) must be properly processed to clear up the bacterial load.

Also, the olympic facilities use the "industrial" type of equipment, which is not even remotely comparable to the average private swimming pool setup.

Yes  Astral london olympics

The best silica sand is that supplied by astral or certikin, if you get sand supplied in old rice sacks you will just be getting  low grade river sand  that will  wear out in no time at all.

If your budget will run to it both  of the above mentioned companies sell top quality graded recycled glass as used in many olympic facilities.

Your third choice is recycled plate glass which by its nature is  strong and  long lasting, and should outlast sand and bottled glass.

Firstly happy new year.

Do any of the members that follow this forum have any experience of these  air water heat pumps particualy those with a reverse cyle capability it is for a small 12 C/M plunge pool. A particular model I have been looking at is made by a company  called Laswim.

Your 8k pump is not going to be very efficient or last as long as it should with an elbow fitted nearly directly to the pump suction.

I to do not sell but i have over 30 years in the UK commercial pool industry. 

1. KEEP SUCTION PIPING AS SHORT AS POSSIBLE

Include a straight run pipe length equal to 5 to 10 times the pipe diameter between the pump inlet and any obstruction in the suction line. Note: Obstructions include valves, elbows, "tees", and etc.

Keeping the pump suction piping short ensures that the inlet pressure drop is as low as possible. The straight run pipe gives you a uniform velocity across the pipe diameter at the pump inlet. Both are important to achieving optimal suction.

Has anyone have recommendations for a company supplying and installing a fiberglass pool 5.5 m x 3.5m, not to worried about filtration etc as I will do that myself. interested in Bermuda pools please feel free to pm me.Many thanks.

On 1/21/2021 at 9:02 AM, Bagwain said:

Thanks Dave.

 

Personally UV Is unnecessary. Yes they kill bateria & viruses if they are a good brand with a crystal bulb. Chinese & Thai ones are typically glass & don't do a good job due to the wrong frequency! They also need cleaning regularly with alchohol to take of the biofilm which builds up.There is no residual sanitiser left in the water so the kill only happens at the bulb. Pilotman gets away with a tablet of Tric-Chlor which gives the pool the sanitising residual & this does most of the job. If it is a small pool this is fine.Floculation system is way over the top with a domestic pool and very expensive. Pool covers are hard to get in Thailand and a good one will cost an arm & a leg!

 

As mention already "Salt Chlorination" is the best way to keep a pool in tip top condition. at around 30 K you will only be geting a Chinese made one. Do this at your own risk. Many people have had bad experiences with cheap brands. Parts are expensive and they don't like the constant humidity! I only deal in PuraPool brand. Arguably the best on the market. 100% Australian made with extended warranties. They are bulletproof! 

 

PM me if you would like more info etc

 

Bagwain is spot on the money.

A continually dosing floc system will not work correctly on domestic pools as the dosing is based on a continual flow through the filters 24/7 ( poly aluminum chloride) PAC

not only that it will clog up the filter leading increased back washing and possible damage to the filter, by all means use a clarifier or flocculant when only necessary .

Uv is a fantastic form of primary disinfection but not suitable for domestic pools as it only  works 100%  if the pool circulation is run 24/7 as the effective  kill is only good as when  the water passes the lamp.

The lamps should be housed in a quartz glass sleeve so as to allow full transmisity of the UV light normal glass is not any good.

As said the quartz glass housing has to be cleaned regularly once every say 3 months, and lamps changed every 5 ... 9 thousand hours to ensure full disinfection.

Also a residual of at least .5 ppm of free chlorine must be in the pool to prevent any cross infection.

If you require any further info on UV disinfection please contact me by pm Have over 25 years experience of using UV as a pool disinfection all be it in a commercial pool application

Off for a trip from Chiang Mai to escape the smoke.

How is Aonang is it busy and have all the Indian touts gone home?