Jump to content
BANGKOK
jonny5

Water balancing and test kits..

Recommended Posts

Just wondering what everyone's using to test there pool water in Thailand.. 

I've a new pool and want to make sure the water is OK. 

 

Any info or links to what people use would be great. 

 

Regards J

Edited by jonny5

Share this post


Link to post
Share on other sites

For most purposes for domestic pools, a simple, very inexpensive test kit for chlorine and pH levels such as this is generally all you need and is the most common. Other, more sophisticated digital, colorimetric and photometric titration methods are also available. There are also test strips to dip in the water but they are not very accurate.

 

Share this post


Link to post
Share on other sites
14 hours ago, SwimmingPoolsThailand said:

For most purposes for domestic pools, a simple, very inexpensive test kit for chlorine and pH levels such as this is generally all you need and is the most common. Other, more sophisticated digital, colorimetric and photometric titration methods are also available. There are also test strips to dip in the water but they are not very accurate.

 

. Other, more sophisticated digital, colorimetric and photometric titration methods are also available.

 

What are these methods please.... 

The basic 1 you suggest is just for Chlorine and PH... But i feel there's more into water chemistry, then just the CL and PH levels. 

 

Regards J

Share this post


Link to post
Share on other sites
On 3/26/2020 at 8:51 PM, SwimmingPoolsThailand said:

For most purposes for domestic pools, a simple, very inexpensive test kit for chlorine and pH levels such as this is generally all you need 

 

This test kit does not even show you how much free chlorine is left to fight pollution/bacteria/algae.

 

Test strips that are very inexpensive give me at least a clue about how much free chlorine is left in the water. The total chlorine from the recommended test kit is completely useless since total chlorine includes the used up and thus useless bound to dirt/bacteria/viruses chlorine.

 

In addition I bought a digital pH meter which after calibration is really very accurate. It was just a few hundred baht...

Share this post


Link to post
Share on other sites

All you really need to know is whether you have free available chlorine present, and the pH to make it effective,< 8.

Share this post


Link to post
Share on other sites
7 minutes ago, Lacessit said:

All you really need to know is whether you have free available chlorine present, and the pH to make it effective,< 8.

OK thanks, but what about CYA.. Is this not the 'sunscreen' for Chlorine... 

Share this post


Link to post
Share on other sites
1 minute ago, jonny5 said:

OK thanks, but what about CYA.. Is this not the 'sunscreen' for Chlorine... 

Cyanuric acid slows down chlorine release, yes. However, you do need to be careful not to overdo it, because high levels of CYA will actually compromise bactericidal activity.

I prefer the keep it simple stupid approach, free chlorine means you are zapping bacteria and viruses. I would use CYA at the bare minimum, 10 mg/L.

A slug dose of copper sulphate is useful in preventing fungi/algae taking hold.

Share this post


Link to post
Share on other sites
8 minutes ago, Lacessit said:

Cyanuric acid slows down chlorine release, yes. However, you do need to be careful not to overdo it, because high levels of CYA will actually compromise bactericidal activity.

I prefer the keep it simple stupid approach, free chlorine means you are zapping bacteria and viruses. I would use CYA at the bare minimum, 10 mg/L.

A slug dose of copper sulphate is useful in preventing fungi/algae taking hold.

Thanks Lacessit, 

 

So how do I test for CYA as the test strips are useless. 

Could you recommend anything.. 

Share this post


Link to post
Share on other sites
14 minutes ago, Lacessit said:

...because high levels of CYA will actually compromise bactericidal activity.

that's why you need to know CA as well which should ideally be between 30-60... With the normally used TCCA chlorine CA will be build up over time rendering chlorine useless if to high...

Total hardness should be know as well as Total Alkalinity (which is of help to keep pH stable if in the right range)

Share this post


Link to post
Share on other sites
1 hour ago, jonny5 said:

Thanks Lacessit, 

 

So how do I test for CYA as the test strips are useless. 

Could you recommend anything.. 

There is a turbidity test which uses melamine to bind to cyanuric acid, resulting in a white precipitate. It's described on the internet, reasonably reliable.

Test strips are usually affected by heat and age. As from memory they are made by Hach in America, so it is anyone's guess what condition they are in by the time a consumer in Thailand buys them.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...